a. (context US slang English) obnoxious, stupid or otherwise unworthy of respect.
Usage examples of "punk-ass".
Or if I go into a battle and have my power outright fail—not be able to drop fang because I have some punk-ass Guardian shit in my system.
Kevin here just told me the punk-ass was the one who started it, and no jury would ever hang a man who'd been called a son of a bitch to his face in public.