I would say that it is a fuck you attitude, lots of distortion with barely understandable lyrics.
Something your parents would disapprove of, something your girlfriend wouldn’t listen to it, something that you could go see live and get into a mosh pit and throw your elbows up. When I went to see the shows back in the day there was a lot of leather, chains, skinheads, Doc Martin, and lots of mohawks, Liberty spikes and greasy hair. Something that made sex drugs and rock ‘n’ roll blush.
I’m not saying this is the definition of punk rock proper, that’s all I could find as I’m driving down the road