Just remembered one of my favorites:
In one of the rodeo shorts, they show a boy running behind a calf (lamb?) and just tackling it to the ground, rolling it over on its back, and holding it there.
Crow: “You were adopted!”
Poor Cameron Mitchell. “This is my Daughter. We’re about the same age.”
They used variations on that joke several times. That one B&W hygeine film where the girl (who was about that age) was combing he hair after getting out of the tub. Crow says “She’s getting ready for her date with Jerry Seinfeld.” 
I also have to mention one of the best highbrow references from that show. In The Brain That Wouldn’t Die, when Kurt was arguing w/ Jan in the Pan he declares her “A mere head in search of a body.” Mike leans over to the bots and says “Isn’t that a Pirandello play?” Killed me on the spot.
They used that one in The Space Children. A young girl sneaks out of her trailer and Mike says “She’s been asked out soooo many times by Seinfeld.”
I like the old sci-fi B movies from the fifties where “Gowns” is listed in the credits. The bots’ reaction is hysterical. “There are going to be gowns!” “John Agar finally gets to wear gowns!”
Strapless evening gowns?
A little bit more on this subject:
From this page:
The DAP is basically just a digital version of tape trading.
(from memory)
It’s breasticaboobical chesticamammical pendularglobular fun;
Fleshicalorbal and mounduloscoopular? Right-o, that’s the one!
Is it glutialmaximal tushitalcrackular bunular morning 'til night?
Well, you’re absitoglandularfannyfantasticalmastocafleshular right!
It’s an arealogical autoerotical tubularbooblar joy!
Exposularregional glandularpouchular fun for girl and boy,
A latissimaldorsical hunglikeahorsical calliphyligical ball
The most bunularfunular
fruitoftheloomular
Frenchicaltongular
wobbitaboobular
Moooo-viiiiiie ooooooof theeeeeeem aaaaaaaaaaaaaaaall!
Hey!
Hey, guys, how’s the movie?
“tubularboobular” joy, of course.
You forgot Tom’s bit while Mike and Crow sing that last part:
Tubular Boobular Joy
Tom: It’s Breastica-Boobical
Chestica-Mammical
Pendular Globular Fun
Mike: Fleshical Orbical
Mombula-Scoopula?
Tom: Right, ho! That’s the one!
Crow: Is it Gluteal Maximal
Tushical Crackular
Bunnular morning 'til night?
Tom: Well, youre Abso-ti-Glandular
Fanny Fantastical
Mastica-Fleshular right!
All: It’s an Areological Autoerotical
Tubular Boobular Joy!
An Exposular-Regional
Batchical-Pouchular
Fun for girl and boy!
A Latissimal Dorsical
Hung-Like-A-Horse-ical
Callipyligical Ball!
(Tom?):The most Bunnular-Funnular
Mike: Fruit-Of-The-Loomular
Crow: Frenchical Tongue-ular
Tom: Wobbit-a-Boobular
Mike (& Crow?): Moooooovieeeeee ooooooof theeeeeem Aaaaaaaaaalllll!
(Tom: Mumbular Bumbular
Fruit-Of-The-Loomular
Frenchical Tongue-ular
Wobbit-a-Boobular
Fleshical Orbical
Score-Us-A-Boobular
Tush-a-Particular Ball!)
All: HEY!
Oh yeah, the credit: “Tubular Boobular Joy” was sung in episode 519 - Outlaw
And for a bit more Space Mutiny fun:
<Mike> Man, I’d rather get a table dance from Trent Lott! (Space Mutiny)
From that bizarre short that appeared to be advertising phones, where the wife is singing a song about how she’s like a better kitchen:
<Mike>: Well, wish in one hand and crap in the other and see which piles up first!
Riding With Death:
<The hero guy, to his trucker friend>: I’m coming up on your rear!
<Mike>: They have such cute euphamisms for sex!
Various other euphamisms, including: My rigid grill structure is approaching your unprotected cargo area!
<Hero> All right, I’m comin’ up on your mud flaps at 67!
I liked the one that had the instructor of a skydiving school in a room, stretching a parachute out over one wall. A man comes in and sees her working:
MAN: “What’re you doing?”
TOM SERVO: “Workin’ for Cristo!”
From “Bloodlust” -
As Betty and Jeanie (or whatever their names were) mince through the jungle in impossibly tight pants -
MIKE: Looks like you need a pants-horn to get into those things!
“Racket Girls”
Servo “And now its the running of the breasts”
Mike “its never easy when you break up with grandma”
“Bloodwaters of Dr. Z”
After the creature is shot
creature-“oh the pain”
Mike-“Jonathan Harris should sue”
I watched Pod People again last night. A few more:
Actor on screen says something about camping.
Tom Servo: Camping? I’ll dress up as Noel Coward and you start reciting Oscar Wilde.
Actor on screen climbs a rope, hand over hand.
Joel: He’s gonna get his Presidential Fitness Award. It’s a shoo-in.
Actress on screen: …Especially with boobs like that!
Tom Servo: Joel, what are boobs?
Joel: You know, like Jethro Bodine.
I just remembered the best line from Horrors of Spider Island:
TOM: Gary! Thy Lord commandeth! Tug your pants down a titch and put on a shirt!
Teenagers from Outer Space: I buy that Niquil for colds, not for you to make Niquiadas.
<Mike> This is the most persistent belt salesman I’ve ever seen! (Puma Man)