Green’s Dictionary of Slang

(US black) to act violently, to murder; thus n. a murdererr.

1997		Eble Campus Sl. Apr. 4: get O.J. on someone – act in an aggressive, violent manner.
1997–2001		Online Sl. Dict. 🌐 OJ v 1. to stab. 2. to kill. Origin: the double murder trial of football star O.J. Simpson. (‘Go ahead, OJ them.’).
2002		‘Touré’ Portable Promised Land (ms.) 155: We Words (My Favorite Things) [...] Iced. Gaffled. OJ’d.
[2005		L. Theroux Call of the Weird (2006) 187: Be for real, nigga, you ain’t no thug / That shit don’t fit you like OJ’s glove].
2015		67 ‘Dead Up’ 🎵 Bad bitch talking ’bout the 6’s telling me she heard that we’re OJ.