There are two instances in the play/musical "Grease" where someone is referred to as "a neat", and I'm having trouble figuring out the meaning.
The first instance is after Danny ("Zuker") finishes describing the girl he's been romantic (and supposedly sexual) with over the summer:
SONNY: Hot stuff, huh, Zuker?
DANNY: I didn’t say that, Sonny!
DOODY: Boy, you get all the “neats!”
The second instance is about Danny telling the track coach Danny is quitting the team.
PATTY: Danny made a shamefully crass gesture and walked off the field.
ROGER: What's a shamefully crass gesture?
SONNY: He gave him "the finger!" (Guys crack up.)
ROGER: What a neat!
So, Danny "gets all the neats" and is himself "a neat".
All I can glean is that it's slang for a certain type of person, but I can't tell WHAT type of person. The first instance seems positive (like Doody would also like to get a neat), and the second instance could either be positive or negative (akin to either "what an inspiration" or "what a fool").
I'm surprised there isn't a readily-available 1950s slang entry at the top of Google search results, but all I can find are entries for "neat" as an adjective or "neat" as a noun meaning either "cattle" or "a certain type of artificial intelligence researcher", which don't seem to apply.
So, does anyone know what "a neat" is in this context?