Green’s Dictionary of Slang

(US black) information.

1970

A. Young Snakes (1971) 32: ‘They got in here [magazine] [...] who the people are that be on the scene and what they say about it all, all such illy-gump as that.’ Champ spoke that bad central city argot, that tight, clipped, acid, hard hip lingo that’s calculated to keep outsiders in their place.