(idea) by pukesick Mon Mar 27 2000 at 12:06:25
A legitimate, or just complaint. "You ain't got no legit beef. When the rumble came (trouble started), you copped a mope (fled) and left us to hold the sack. You'll get your end (share), yes you will, under the arch (a beating or shot in the head)."

- american underworld dictionary - 1950
I like it!