bad ass

Noun

badass (plural badasses)

1. (US, slang, sometimes considered vulgar, negative connotation) A belligerent or mean person; a person with an unpleasantly extreme appearance, attitudes, or behavior.
   • Don’t mess with that guy, he’s a real badass.
2. (US, slang, sometimes considered vulgar, positive connotation) A person considered impressive due to courage, skill, daring, audacity, and/or toughness.
   • "I'm a badass." (Jack Nicholson to a New York friend, early 1973.)1975, Norman Dickens, “Badass”, in Jack Nicholson: The Search for a Superstar, New York, N.Y.: New American Library, →OCLC, page 124

See all 4 meanings of badass