# What is the anatomical word for the crease where the butt cheek turns into the back of the leg? **URL:** \ **Category:** Factual Questions\ **Created:** [May 28, 2014, 10:48pm UTC](https://boards.straightdope.com/t/what-is-the-anatomical-word-for-the-crease-where-the-butt-cheek-turns-into-the-back-of-the-leg/689511 "2014-05-28T22:48:39Z")\ **Posts on this page:** 14\ **Page:** 3
**Author:** ![SpeedwayRyan](https://avatars.discourse-cdn.com/v4/letter/s/ce7236/32.png) [@SpeedwayRyan](https://boards.straightdope.com/u/SpeedwayRyan)\ **Post date:** [November 26, 2014, 2:55pm UTC](https://boards.straightdope.com/t/what-is-the-anatomical-word-for-the-crease-where-the-butt-cheek-turns-into-the-back-of-the-leg/689511/41 "2014-11-26T14:55:02Z")
> [@Kelevra](#): > > When I was in college we called that “Factory Air”. I’ve heard that before, and it cracks me up. That said, girls with “thigh gap” are far, far too skinny for my taste! ---
**Author:** ![Happy\_Lendervedder](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/happy_lendervedder/32/8488_2.png) [@Happy\_Lendervedder](https://boards.straightdope.com/u/Happy_Lendervedder)\ **Post date:** [November 26, 2014, 3:37pm UTC](https://boards.straightdope.com/t/what-is-the-anatomical-word-for-the-crease-where-the-butt-cheek-turns-into-the-back-of-the-leg/689511/42 "2014-11-26T15:37:46Z")
> [@GusNSpot](#): > > When I was a preteen in the mid 50’s, we called them ‘fins.’ > > "Wow, her fins are showing… " This wins it for me. I will be dropping the term “intermammary sulcus” on my wife before weekend’s end, however. ---
**Author:** ![Leo\_Bloom](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/leo_bloom/32/10377_2.png) [@Leo\_Bloom](https://boards.straightdope.com/u/Leo_Bloom)\ **Post date:** [November 26, 2014, 6:33pm UTC](https://boards.straightdope.com/t/what-is-the-anatomical-word-for-the-crease-where-the-butt-cheek-turns-into-the-back-of-the-leg/689511/43 "2014-11-26T18:33:03Z")
> [@bibliophage](#): > > Gluteal sulcus: [Gluteal sulcus - Wikipedia](http://en.wikipedia.org/wiki/Gluteal_sulcus) [includes slightly outre photograph] The following playlet was inspired by this cite and is written by OP. [CURTAIN] [Enter _ME_, a non-descript disheveled man, slightly hungover. _IPAD_ on couch. (_IPAD_ is mute.) _ME_ takes _IPAD_, fiddles with it. _WIKI_ appears on _IPAD_, which is visible to all.] **Me** Wait, you’re telling me only humans and great apes have gluteal sulci. That’s it? **Wiki** _(nods sagely)_ **Me** You’re full of it. I’m gonna ask the dudes at SD. [CURTAIN] ---
**Author:** ![Leo\_Bloom](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/leo_bloom/32/10377_2.png) [@Leo\_Bloom](https://boards.straightdope.com/u/Leo_Bloom)\ **Post date:** [February 8, 2015, 8:52pm UTC](https://boards.straightdope.com/t/what-is-the-anatomical-word-for-the-crease-where-the-butt-cheek-turns-into-the-back-of-the-leg/689511/44 "2015-02-08T20:52:25Z")
> [@Leo\_Bloom](#): > > OP here. Same situation last night, and I pointed out, with great pleasure, the woman’s gluteal sulcus (should that be sulcii in plural?), and I gave credit where credit’s due. I love me my SD… OP here. Same story, same attribution, same expression of emotion to SD… This time, after my dog-park friend had listened to my story/“guess what you call it”/punchline (were her eyes glazing?), she said “Oh, you mean underbutt.” Not sure if she just invented the term, meaning she never thought of thinking about it (like the rest of the world), or it’s a known term. Certainly makes sense, with “underboob” a quite understandable word used nowadays. (Side question: when did “sideboob” and “underboob” become a thing enough for the word to enter vocabulary–it’s used certainly by men, but I only noticed it as a word in Internet guy-talk pin-up girl discussing. Does it–the word, not the anatomical feature–have a recent history?) > [@](#): > > …Last time, they were jorts, which I had never heard of. This time, my wife sort of raised my vocabulary ante when she said they were “janx.” > > Has anyone heard of this word/article of clothing before? > > Jeans-shorts top with spandex from waist down. _This_ time I mentioned a spandex-pants article of clothing I had become aware of. I thought it was called Spanx, but she said that wasn’t it. I didn’t get straight just what Spanx is/are. “Support garments” I think she said. A sexy girdle. As the they say in Zombie haute couture: plus ça change, plus la même chose. ---
**Author:** ![OldGuy](https://avatars.discourse-cdn.com/v4/letter/o/3bc359/32.png) [@OldGuy](https://boards.straightdope.com/u/OldGuy)\ **Post date:** [February 9, 2015, 4:47am UTC](https://boards.straightdope.com/t/what-is-the-anatomical-word-for-the-crease-where-the-butt-cheek-turns-into-the-back-of-the-leg/689511/45 "2015-02-09T04:47:38Z")
As a kid we called that area the “sit spots”. This was almost always in connection with a spanking. I.e., it’s where it hurt to sit after one. ---
**Author:** ![LSLGuy](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/lslguy/32/5813_2.png) [@LSLGuy](https://boards.straightdope.com/u/LSLGuy)\ **Post date:** [February 9, 2015, 1:43pm UTC](https://boards.straightdope.com/t/what-is-the-anatomical-word-for-the-crease-where-the-butt-cheek-turns-into-the-back-of-the-leg/689511/46 "2015-02-09T13:43:28Z")
> [@Leo\_Bloom](#): > > …_This_ time I mentioned a spandex-pants article of clothing I had become aware of. I thought it was called Spanx, but she said that wasn’t it. I didn’t get straight just what Spanx is/are. “Support garments” I think she said. A sexy girdle. … Behold: the power of Spanx … [http://www.spanx.com/](http://www.spanx.com/) ---
**Author:** ![RTFirefly](https://avatars.discourse-cdn.com/v4/letter/r/c77e96/32.png) [@RTFirefly](https://boards.straightdope.com/u/RTFirefly)\ **Post date:** [February 9, 2015, 7:19pm UTC](https://boards.straightdope.com/t/what-is-the-anatomical-word-for-the-crease-where-the-butt-cheek-turns-into-the-back-of-the-leg/689511/47 "2015-02-09T19:19:16Z")
> [@Leo\_Bloom](#): > > This time, my wife sort of raised my vocabulary ante when she said they were “janx.” That’s the spirit! 😛 ---
**Author:** ![lieu](https://avatars.discourse-cdn.com/v4/letter/l/c2a13f/32.png) [@lieu](https://boards.straightdope.com/u/lieu)\ **Post date:** [February 9, 2015, 7:27pm UTC](https://boards.straightdope.com/t/what-is-the-anatomical-word-for-the-crease-where-the-butt-cheek-turns-into-the-back-of-the-leg/689511/48 "2015-02-09T19:27:36Z")
> [@GusNSpot](#): > > When I was a preteen in the mid 50’s, we called them ‘fins.’ > > "Wow, her fins are showing… " I could see ‘gill’ being appropriate as well. ---
**Author:** ![gonzoron](https://avatars.discourse-cdn.com/v4/letter/g/a6a055/32.png) [@gonzoron](https://boards.straightdope.com/u/gonzoron)\ **Post date:** [February 9, 2015, 8:02pm UTC](https://boards.straightdope.com/t/what-is-the-anatomical-word-for-the-crease-where-the-butt-cheek-turns-into-the-back-of-the-leg/689511/49 "2015-02-09T20:02:40Z")
I propose “tuchus sulcus” for the slang term. ---
**Author:** ![Enright3](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/enright3/32/2897_2.png) [@Enright3](https://boards.straightdope.com/u/Enright3)\ **Post date:** [February 9, 2015, 8:33pm UTC](https://boards.straightdope.com/t/what-is-the-anatomical-word-for-the-crease-where-the-butt-cheek-turns-into-the-back-of-the-leg/689511/50 "2015-02-09T20:33:30Z")
> [@bubba001](#): > > Ok, now a followup question - what’s the name for the space at the top of the thighs, between the legs? > [@TheChileanBlob](#): > > On reddit they call it “dat gap.” > [@UncleRojelio](#): > > ‘Thigh Gap’ Pick up any fashion magazine for the cite. > [@Kelevra](#): > > When I was in college we called that “Factory Air”. We always called it the pusky. 🙂 The taint was the area between the uh… front hole and the back hole; whereas the pusky was perpendicular to that and was basically the width of the area between the legs. ---
**Author:** ![Waskov](https://avatars.discourse-cdn.com/v4/letter/w/e47c2d/32.png) [@Waskov](https://boards.straightdope.com/u/Waskov)\ **Post date:** [February 10, 2015, 2:05am UTC](https://boards.straightdope.com/t/what-is-the-anatomical-word-for-the-crease-where-the-butt-cheek-turns-into-the-back-of-the-leg/689511/51 "2015-02-10T02:05:42Z")
From Viz Comic’s invaluable Profanisaurus: \*1. Toblerone Tunnel The triangular gap between a woman’s upper thighs, immediately beneath the vulva. From the evocative shape of said void and the habit of some, who like to slide the eponymous chocolate treat through it. Woman: Do these jeans make me look fat? Man: No, but they do accentuate your Toblerone tunnel. \* ---
**Author:** ![Senegoid](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/senegoid/32/6606_2.png) [@Senegoid](https://boards.straightdope.com/u/Senegoid)\ **Post date:** [February 10, 2015, 2:49am UTC](https://boards.straightdope.com/t/what-is-the-anatomical-word-for-the-crease-where-the-butt-cheek-turns-into-the-back-of-the-leg/689511/52 "2015-02-10T02:49:17Z")
> [@gonzoron](#): > > I propose “tuchus sulcus” for the slang term. The plural of that being, I presume, _tuchi sulci_ ? ---
**Author:** ![Leo\_Bloom](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/leo_bloom/32/10377_2.png) [@Leo\_Bloom](https://boards.straightdope.com/u/Leo_Bloom)\ **Post date:** [February 12, 2015, 3:48pm UTC](https://boards.straightdope.com/t/what-is-the-anatomical-word-for-the-crease-where-the-butt-cheek-turns-into-the-back-of-the-leg/689511/53 "2015-02-12T15:48:29Z")
> [@Enright3](#): > > We always called it the pusky. 🙂 > The taint was the area between the uh… front hole and the back hole; whereas the pusky was perpendicular to that and was basically the width of the area between the legs. I read that, and continue to since I’ve never seen it and it is a sound-alike, to “pushky,” which is the Yinglish casual word for the little box religious Jews have to put change in daily for charity. Heh. ---
**Author:** ![garxie](https://avatars.discourse-cdn.com/v4/letter/g/9de0a6/32.png) [@garxie](https://boards.straightdope.com/u/garxie)\ **Post date:** [February 12, 2015, 6:12pm UTC](https://boards.straightdope.com/t/what-is-the-anatomical-word-for-the-crease-where-the-butt-cheek-turns-into-the-back-of-the-leg/689511/54 "2015-02-12T18:12:13Z")
> [@Roderick\_Femm](#): > > I sadly confess to the world that I have these. They get red and irritated. What do women do about that? Clean with 50% isopropyl alcohol once a day. That should easily do the trick. If not, then do the alcohol thing and also make sure you do what you can to keep that area dry. [Previous page](https://boards.straightdope.com/t/what-is-the-anatomical-word-for-the-crease-where-the-butt-cheek-turns-into-the-back-of-the-leg/689511.md?page=2)