Green’s Dictionary of Slang

B.B. n.3

[bad buzz, i.e. the atmosphere such a prisoner creates]

(N.Z. prison) a violent prisoner.

[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 14/2: BB n. 1 an inmate who uses standover tactics. [from an abbreviation of the street-slang expression ‘Bad Buzz’ (a bad reaction or experience)].