I’ve been known to use ‘pit’ as a verb.
“Hugs and puppies”. I read it here and saw it also on Buffy the Vampire Slayer.
“offenderati” can be used in Dutch, too.
Often on the SDMB I see someone using an description of a behavior, that is so spot-on, I immediately wonder how I got by without that word.
For instance, the kind of demonstrative mourning done in “silent marches” and road-side memorials, for instance, gave me an uneasy feeling I couldn’t quite put my finger on untill I saw someone here use the word "“Power grieving”. Power grieving. Of course, that’s it.
“Attention whore” is another one. Finding such discriptions I mostly why I read the Pit.
I just had to steal that one in my sig…
“Quit hoggin’ all the stupid”, I think it was a Wallyism, I could be wrong.
‘Attention whore’, for sure. ‘Asshat, fuckwit’, of course.
“Weapons grade Bullonium”, I don’t use it much, but I like it!
I like, “when come back…” but I don’t use it, except at home and we all love pie at home 
I’ll be using this one in the future 
and I’ve grown to love “Fucktard!”
“Asshat” has become a regular word in my vocabulary. I don’t know if it originated here, but this is where I first saw the term used. Also, “glurge.”
Someone on OkCupid self-identified as being a liberal, and in her profile she said that she enjoyed talking about physics even though she didn’t understand it much. I responded that we should get together. “We could talk about what an asshat Bush is, then we can move on to string theory.”
She gave me a very positive response, and thought asshat was the funniest word she ever heard.
She then disappeared.
I don’t think that asshat originated here. Glurge made its first appearance on snopes long before it showed up here.
From all the way back when Satan was posting here, I’ll always love “In closing, lick my bag.”
“We’re born, we die, and in between we defrost the fridge sixty times.”
Someone has “Never leave home without a vagina” as a sig-line. I’ve used that before. It’s damn good advice.
Probably from the story that drug me kicking and screaming into this den of iniquity in the first place.
Cain’t cut through that shit with a hack-saw
Thank you Sampiro. Though it take a century, I will have my revenge.
I am the proud owner of a DivaCup, mostly because of comments posted by Doper women. In this TMI thread, capybara said that the DivaCup makes her “inappopriately evangelical at parties.”
This phrase is permanently pasted in my mind, and still makes me giggle when I think of it.
Don’t know what a DivaCup is? Go here, and change your life. No, really!
One phrase has always stuck with me. I can’t find it for the life of me now, but it was something like:
“Do not underestimate me because I have cats and dress well. I was a marine and I can kill you.”
From a Pit thread ages ago, someone speculated that another poster must have “force evolved thumbs” in order to post on the SDMB. I love that.
Somewhat more recently, in a thread about annoying cell phone users, a poster made a comment along the lines of “I can’t count the number of times I’ve seen someone get a call informing them that a kidney donor as finally been found… oh wait, yes I can, it’s NONE” which is an excellent point to make to people who seem to need a phone at the ready at all times in the event of an “emergency.”
I wish I remembered the posters who said these, they really made an impression!
I picked up “carmel covered crack” from the boards.
“I have a butthole, too, but that doesn’t imply I want a running jigsaw inserted into it.”—Cervaise, The Telemarketer Speaks. I Respond.
Another one by Cervaise - his new punchline to the old Calvin Coolidge story never gets old to me. It popped into my head while I was shopping this morning, and I started laughing in the middle of J.C. Penney’s.
From the same OP, I rarely get the chance, but try to use it whenever the opportunity presents itself:
That’s probably the same reason why, when you stop at Starbuck’s for a cuppa, instead of giving you a latte, they punch you in the tit.
As well as the simple, the classic:
Bring it on, bitch.
That last one I get to use much more often, though, admittedly, it’s more often in a joking manner than a serious one.