Go listen to GG allin and you'll see
You Scumfucs gotta pick up some gg allin records
A very dirty form of punk rock, usually characterized by offensive lyrics about rape, killing, sex, death, molestation, sodomy, sex this sex that etc etc etc.
Made famous by GG Allin.
GG Allin had a tattoo that said "Scumfuc" and so people decided that it'd be cool to use that term.
They were wrong because it became just another trend.