(vulgar) An orgy, especially a sexual one. / (US, slang) A gang fight. / (US, slang) Protecting gang turf, especially when dealing drugs or other black market objects. / (informal, dated) A gang rape.

(idiomatic, archaic) A farmer's servant, especially a thresher.

(idiomatic, often hyphenated) Good, superior, excellent.

(transitive, informal) To damage. / (transitive, informal) To put someone in prison, or into their individual cell.

(idiomatic) Efficiency; cost-effectiveness; value.

(transitive, idiomatic) To do something quickly, in a slipshod, or unprofessional manner. / (intransitive, aviation, slang) To eject.

(slang) Someone who works or studies seemingly way too much.

simple past tense and past participle of bang up

(informal) Spending time in prison or jail. / (informal) Physically injured or wounded.

(colloquial) Especially good; wonderful; superb.