The last line in that exchange actually bugged me because I felt it was an overdub to explain the joke (in case people didn’t notice the pinstripes being screwed up).
Note the earlier reference explains the Kim Lucky day joke which someone above didn’t understand. (I too use the “this is me” line).
One of my favorite Seinfeld callbacks is the episode when Mr. Lippman decides to open the muffin top bakery and Elaine is giving him advice on how to run the business.
Elaine: And one more thing. It’s not “Top of the Muffin… TO YA!!”
Mr. Lippman: Yes! It is!
There was an episode of Wings where the two pilots are stuck on the tarmac with some incredibly annoying guy who keeps asking things. One of his questions was “If you were bitten by a monkey, what sort of medicine would they give you?”
Later he says “My mother always said there’s no stupid questions” to which one of the brothers quips “Did you ever ask her the one about the monkey?” To this day, that’s my immediate thought when I hear that there’s no dumb questions.
From Night Court, when a man is in court because a customer complained that while he was blowing up his sex doll, she “busted a boob.”
Manufacturer: These dolls are sturdy. See, I’ll blow up one now.
Dan: Do you know how long that is going to take?
Judge Harry: No. (long pause) But I bet you do.
One joke from Night Court that sticks in my mind was nonverbal:
The defendant is a little old lady with a husky voice. She identifies herself as Miss So-and-So from a sex hotline.
Dan reacts immediately by turning to look at her in open-mouthed shock, as if to say “*You’re *Miss So-and-So?!?” :eek:.
Got a huge roar from the audience!
Then, of course, there’s the classic bit where Sheldon, Howard, and Raj are playing an RPG where they’re building settlements:
SHELDON: I need wood. Do either of you guys have wood?
Howard and Raj start laughing. Sheldon’s oblivious to the humor.
SHELDON: What are you laughing at? Come on, I need wood for my erection.
A few minutes go by, and they go off on another topic. Finally, after a moment of silence:
SHELDON: Now, then: Who here has wood?
I know this is junior-high grade humor, but I almost fell out of my chair laughing!
Seinfeld also occasionally had a joke that you’d have to be a New Yorker to get. My favorite was the episode in which Kramer gets lost in downtown and calls Jerry for help. Jerry asks him if he can point out any recognizable landmarks.
Kramer: "I’m outside a “Ray’s Pizza”!
Jerry: “Is it Original or Famous?”
The joke being that in NY, there is (or at least was in the 1990s) a “Ray’s Pizza” on practically every corner in Manhattan. They were all different, independent stores with the same name, although they had some variation on the terms “original”, “famous” in their name: “Famous Ray’s Pizza”, “Ray’s Famous Original Pizza”, “Original Ray’s Famous Pizza”, etc.
Thanks for explaining “Kim Luck-y day;” first round at Rosie’s is on me (grape Nehi, anyone?)
Let’s not forget
KRUSTY’S KRAZY KWANZAA!
Unpopular? That’s all over 4chan!
In the Seinfeld episode where George has to pick up Mr. Steinbrenner’s lunch, he drops money in the restaurant tip jar, but the worker doesn’t notice. George is complaining to Jerry that the whole point of the tip is that the person sees you giving it.
Jerry: “So you don’t make a habit of giving to the blind.”
George: “Not bills.”
Another from MAS*H:
Radar: [as Hawkeye and Trapper wrestle with Frank Burns, for his battery-warmed socks] They’re hunting socks, sir.
Henry Blake: At this hour?
There’s an episode of Futurama, where a robot has a “Bot Mitzva.”
During the party, there is a banner with Hebrew on it in the background.
I was watching this with a friend, and I said “hey, pause that!”
Even with my grade-school Hebrew education, I could figure out that it said “Today you are a Robot."
My favorite joke of all time that went by unnoticed was in the Spongebob Squarepants Movie (ok it’s a move, but it’s based off a tv show).
SB and Patrick are filling up their burger car at a gas station and these two hillbilly-like fish are making fun of them for various reasons. This exchange happens:
Patrick: Are they laughing at us, Spongebob?
SB: Noooo Patrick, they’re laughing next to us.
No one in the theater laughed but me. It’s a preposition joke!
Also, while I’m already cheating, second-funniest-joke-ever came from Monsters vs. Aliens where the Creature from the Black Lagoon guy comes out of hiding after 20 years and says “Man it’s hot, is it hot? Did the globe get warmer? Because that’d be a real convenient truth.”
Was it a girl robot? Double whammy joke.
Going way back: On That Girl, Don Hollinger has just been introduced to Nigel Prince, the English photographer who eventually falls in love with Ann:
NIGEL: Hollinger, Hollinger … I once knew a polo player named Hollinger.
DON: I once knew a dog named Prince.
Didn’t the end credits also list Tuttle as himself?
Indeed, they did. 
One of my favorites is from House MD:
Cameron (coming in with Foreman and Chase): We’ve got rectal bleeding.
House: What, all of you?
Batman:
The villain is about to transform Batgirl into a flat piece of paper, the male sidekick eyes her and says. “What a shame.”