I. -ˌas adjective
Date: 1955
1. often vulgar : ready to cause or get into trouble : mean
pretending to be a badass gunslinger — L. L. King
2. often vulgar : of formidable strength or skill
such a badass guitar player — N'Gai Croal
II. noun
Date: 1956
often vulgar : a person who is badass