Green’s Dictionary of Slang

bungy n.3

In phrases

do the bungy (v.) [SE bungy jumping, ‘[An] extreme leisure sport where participants leap from a high bridge or building attached to a long elasticised rope, then bounce and swing at its end’ Looser (2001)]

(N.Z. prison) to commit suicide by hanging, thus bungy-jumper, a suicidal inmate, bungy jumping, suicide by hanging.

[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 34/1: do the bungy to commit suicide by hanging bungy jumper n. a suicidal inmate bungy jumping n. suicide by hanging.