(n) 1) a person or being that is considered to be intimidating and tough, and is generally able to take on almost most other persons or beings in a conflict, whether it be verbal or physical.
(n) 2) the name of the wallet that belongs to Juelz, played by Samuel L. Jackson, in the bad-ass movie, "Pulp Fiction"
1) Arnold Schwarzenegger is a bad-ass motherfucker. Especially in films like "Predator" and "Terminator 2".
2) I would piss my pants if Jet Li wanted to fight me; he's a bad-ass-motherfucker.