Green’s Dictionary of Slang

working-man n.

(N.Z. prison) a burglar.

[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 204/1: working man n. a burglar.

In compounds

(n.)

(US) the top of the crevice between a man’s buttocks, visible when he bends over and the waist of his low-cut trousers is forced downwards.

[US] P. Munro Sl. U.