Green’s Dictionary of Slang

1. (orig. US black) to kill or murder.

1968		N. Heard Howard Street 217: Slick, Billy-A and Baby Lawrence had offed the New York dope dealer.
1972		G.V. Higgins Friends of Eddie Coyle 58: They run around all the time saying, ‘Off the pigs’.
1970		B. Seale Seize the Time 447: Off the Pig means to kill the slave master. It doesn’t mean commit murder.
1981		H. Gould Fort Apache, The Bronx 46: The shots sounded like firecrackers. ‘She’s offin’ ’em,’ Angel shouted.
1990		J. Wambaugh Golden Orange (1991) 161: He offs himself with a handgun.
1997		T. Fontana ‘Visits’ Oz ser. 1 ep. 2 [TV script] Honestly, I don’t know who offed Dino.
2002		J. Lerner You Got Nothing Coming 7: Don’t even think of offing yourself during my shift.
2005		Mad mag. Apr. 19: The lack of Federal standards regarding what kind of gas may be used in offing the creep is tantamount to cruel and unusual punishment.
2011		J.J. Connolly Viva La Madness 275: How did Jenna feel about Jesus offing her boyfriend?
2012		D. Whish-Wilson ‘In Savage Freedom’ in Crime Factory: Hard Labour [ebook] Most pundits think [he] offed my first son, Kevin.
2013		J. Stahl Happy Mutant Baby Pills 156: I had kind of killed for the woman [...] I’d offed a man in a public toilet.
2015		L. McInerney Glorious Heresies 13: ‘Clean up after your mother offs someone’.
2020		C. Hiaasen Squeeze Me 69: He got wasted and started bragging how he offed some rich bitch.

2. (orig. US) of a man, to have sexual intercourse.

1967

M. Braly On the Yard (2002) 205: The yard said that Jacob ‘Stoneface’ Blake would rather boot a convict in the ass than off his old lady.

3. (US Und.) to rob, usu. with violence.

1968		N. Heard Howard Street 19: If Gypsy Pearl didn’t hurry up, he’d be too weak to off that big trick.
1972		E. Sanders Family 188: Some sort of robbery [...] the offed travelers’ checks, the trading in dope.
2000		(con. 1940s–60s) Décharné Straight from the Fridge Dad.

4. (US black) to beat up someone.

1967		M. Braly On the Yard (2002) 198: Cadillac was the ex-heavyweight champ of the joint [...] ‘Offin’s my game, and I pimp a taste. Shoot crap, too.’.
1972		D. Claerbaut Black Jargon in White America 74: off v. 1. to maul; beat up someone.
1980		E. Folb Runnin’ Down Some Lines 106: Terms like to fire, to blaze on, to off, or to drive on someone mean just that – to do unto others before they do you.

5. (US police) to apprehend and arrest someone.

1975

Sepe & Telano Cop Team 178: We can off him when he gets back.