1. adjective. having extremely favorable qualities
2. adjective. pertaining to a person or thing that is
rugged, strong, and/or ready to show these qualities
3. noun. person who is perceived to have the qualities of
definition 2
1. I have a bad-ass
car with a kickin sound system and bitchin rims.
2. The armored tank is a bad-ass military vehicle that can roll over just about anything.
3. Mohammed
Ali was a bad-ass in the boxing ring.