Green’s Dictionary of Slang

(N.Z. prison) a capsule of the strong painkiller temgesic.

2001

D. Looser Boobslang [U. Canterbury D.Phil. thesis] 23/1: 1 temgesics. Note: a temgesic is a Class C drug used medically as a painkiller during the treatment of cancer patients [...] very popular amongst criminal subcultures during the 1980s.