A man who is insanely rich, sells guns, likes to smoke and joke with you, but is not very lucky with the women because he has a quick temper. If you mess with him, he'll steal your truck or mug you.
Real definition: James Burke, also known as "Jimmy the Gent", was an Irish American gangster and Lucchese crime family associate who is believed to have organized the 1978 Lufthansa heist
Bill: Damn man, Jimmy Conway just mugged me!
Bob: You might know who he is, but he knows who you are.