What is "goniff"

Usage examples of "goniff".

Marvin is your goniff brother who is serving six to ten for passing bogus bills.

A society goniff who reported the comings and goings of the heeled for a rotten two percent.

These goniffs have got some smut pictures of her, from before I bought her contract.

He was intimate with cracksmen and fences, magsmen, goniffs, and shofulmen, the swell mob, the fancy sportsmen and sporting houses, the citadels of the underworld.