(idea) by pukesick Fri Mar 17 2000 at 11:34:56
1. A policeman's uniform. 2. An outer framework of reinforced steel built around a safe, vault, or strong box. "What do these joints want with a keister (safe)? They got a bug (alarm) and a harness on them, and you get crabs (nothing of value) when you kick them open (crack them)."

- american underworld dictionary - 1950
I like it!