Do you remember the movie, "Innocent Man" starring Tom Selleck? He was framed by two Detectives who misread s search warrant and entered the wrong house for alleged drugs.
Tom Selleck was the startled home owner who had a hair dryer in his hand whe the detectives broke into his residence. The detectives got spooked shot him and then planted a throw down and cocaine in his house.
He was brought to trail and convicted and sentenced to prison for a number of years. While in prison he crosed the path a gang leader named Jingles, who was the leader of the B.G. Black Guerilla's gang who threatened to kill him unless he became their kid in prison.
After a severe beating of Selleck, Jingles told him to, "just be cool and everything would be everything in prison."
Well, Selleck after some prompting took matters into his own hands and stabbed Jingles to death with a shard of sharpened plastic. This ended his harassment and he became a independent type leader in prison unti he was finally released on parole.
I hope this clarifies the expression which gained you r attention.NSNR
Thanks for info on "Jingles"....I've never heard of the movie but Tom Selleck is "hot" so I'll probably check it out...heh, heh, heh!