I didn't get the reference/joke/idiom on "out on a tear last night".
Fiorello: No, that's no good, too. (they rip the contracts again until there's practically nothing left.) Hey, how is it my contract is skinnier than yours?
Driftwood: Well, I don't know. You must've been out on a tear last night. But anyhow we're all set now, aren't we?
Fiorello: Oh sure.
I've checked the definition on Merriam-Webster and it makes no sense to me. Definition:
Definition of on a tear (US, informal): having great success over a period of time The team has been on a tear in recent weeks. The economy is on a tear, but can it last?