Here's a few:
KRAMER: Oh, come on Jerry. You gotta see the operation. They're gonna cut him open. His guts'll be all over the place... "
George: What kind of operation is it?
KRAMER: Spleenectomy.
GEORGE: Isn't that where they remove the--
KRAMER: Don't ruin it for me, I haven't seen it yet!
KRAMER: You meet a proctologist at a party, don't walk away. Plant yourself there, because you will hear the funniest stories you've ever heard. See, no one wants to admit to them that they stuck something up there. Never! It's always an accident. Every proctologist story ends in the same way: 'It was a million to one shot, Doc. Million to one'.
JERRY: The key to eating a black and white cookie, is you want to get some black and some white in each bite. Nothing mixes better than vanilla and chocolate. And yet, still, somehow racial harmony eludes us. If people would only look to the cookie. All our problems would be solved.
GEORGE: Yeah, I'm a great quitter. It's one of the few things I do well. I come form a long line of quitters. My father was a quitter, my grandfather was a quitter... I was raised to give up.
MOYLE: No! Don't touch anything! Don't touch a thing! Away!
(MUTTERING).. I coulda been a kosher butcher like my brother. The money's good. There's a union, with benefits. And, cows have no families. You make a mistake with a cow, you move on with your life... Anyway. (so many great lines in that episode)
And of course... NO SOUP FOR YOU!