Green’s Dictionary of Slang

1. (US black) a common black nickname [? SE T-bone steak, thus implying virility; however, Major (1994), associates the term with blues musician Aaron ‘T-bone’ Walker (1910–75), who took the name from his own middle name, Thibeaux, thus implying that the man, not the meat, was the paradigm].

1983		R. Klein Jailhouse Jargon and Street Sl. [unpub. ms.].
2001		J. Stahl Plainclothes Naked (2002) 91: Shit hits the fan, T-bone, you lose your nerve.

2. (N.Z. drugs/prison) a tablet of temagesic.

2001

D. Looser Boobslang [U. Canterbury D.Phil. thesis] 185/1: T-bone n. a temgesic tablet.