Green’s Dictionary of Slang

gorilla adj.

[gorilla n.1 (1)]

1. (US) aggressive, menacing, thuggish.

[US]A. Stringer Door of Dread 84: Yuh gimme a pain in the neck! Whaddayuh take me for, anyway? Yuh save that bull-con for the gorilla-guy who’s butlerin’ for this hang-out!
[US]C. Coe Me – Gangster 129: ‘This,’ the big boss cracked when he saw me, ‘is your gorilla son, isn’t it?’.
[US]‘Ed Lacy’ Men from the Boys (1967) 28: You look like your usual burly gorilla self.
[US]E. Torres After Hours 36: This ain’t no, eh, gorilla job?
[US]D. Woodrell Muscle for the Wing 91: I went back to the stickup dodge, gorilla work.
[US]50 Cent ‘Wanksta’ 🎵 We in the club doing the same ol’ two step / Gorilla unit cause they say we bugged out / Cause we don’t go nowhere without toast we thugged out.
[US]‘Dutch’ ? (Pronounced Que) [ebook] Some tried that gorilla shit like they were real killers, when, in fact, most were flunkies for larger dudes.

2. large, substantial; often of a drug addiction [note gorilla n.2 ].

[US]Last Poets ‘Jones Comin Down’ 🎵 Two small treys – that’s enough to take my gorilla jones away.
[US]E. Grogan Ringolevio 466: A monster, gorilla habit like the one Emmett had on his back.
[US]C. Hiaasen Nature Girl 248: [...] considering the gorilla dosage of Vicodin that he’d consumed.

In compounds

gorilla pimp (n.) (also gorilla)

1. (US black) a pimp who controls his prostitutes by threats and actual violence.

[US]‘Iceberg Slim’ Pimp 62: ‘Weeping’ was a cold ‘gorilla’ all right.
[US]J. Allen Assault with a Deadly Weapon 102: A gorilla pimp just whup a broad all the time.
[US]Ebonics Primer at www.dolemite.com 🌐 gorilla pimp Definition: a brutal or cruel pimp Example: You beat your ho’s and you is a gorilla pimp.
opinion in United States v. Pipkins No. 02–14306 (11th Cir.) 2 Aug. 🌐 A ‘guerilla pimp’ (as other pimps and prostitutes considered Moore) primarily used violence and intimidation to control his prostitutes.

2. attrib. use of sense 1.

[US]Milner & Milner Black Players 228: So the amount of ‘sweet macking’ is balanced by a generous amount of ‘gorilla’ pimp tactics.