badass

1. (US, sometimes considered vulgar, slang, negative connotation) A belligerent or mean person; a person with an unpleasantly extreme appearance, attitudes, or behavior.Examples: "Don’t mess with that guy, he’s a real badass."; "A shake down officer, Sgt. Soaper, and Capt. Swarts, have been reading all my mail, including GCN (which is authorized to come in). Soaper has been sending the prison bad-asses to my cell to force me to have sex with them. Yesterday, Soaper opened my door and 2 prisoners came in and raped me. Capt. Swarts told me that he was going to make me pay for writing letters to GCN and that there was nothing anyone could do about it."; "There are badasses, and there are badasses. Dothan is one of the latter, from a family full of badasses. I'm not saying he isn't a decent sort. He's fully rational, not like his brother Curtis. But Christ, when the sombitch gets mad …"USslang

2. (US, sometimes considered vulgar, slang, positive connotation) A person considered impressive due to courage, skill, daring, audacity, and/or toughness.Examples: ""I'm a badass." (Jack Nicholson to a New York friend, early 1973.)"; "The Oakland Raiders are one of the few teams that I have any feelings for besides the Steelers. Nowadays they're a bunch of wannabe badasses, but back in the day they were something to behold."; "Men and women from the CIA's Directorate of Operations (DO) would return from Afghanistan and tell stories about Task Force 11, an amalgamation of Special Forces bad-asses from the various branches of the U.S. military."USslang