Explain this Seinfeld joke to me

I’d always thought of it as “newer.”

Ah yes:

Jerry: You know there is always the possibility, that she called an audible.

George: What do you mean?

Jerry: Well she got up to the line of scrimmage, didn’t like the looks of the defense and changed the play.

George: I think things were going ok. We were having a nice conversation.

Jerry: Uh huh.

George: I mentioned how I liked horse manure.

Nice subtle riff on George’s NY accent;“Ma-newuh” wouldn’t work with another straighter reading…plus subtle undercurrent of George not really listening to Kelly talking about herself:

George being a dweeb and spouting on about meaningless shit, which turns off the date. I just love the Seinfeldians being the human equivalent of the messed up Looney Toons characters. Great writing!