Green’s Dictionary of Slang

1. (orig. US campus) filth, mess, dirt.

1975

G. Underwood ‘Razorback Sl.’ AS L:1/2 65: This glass has scrunge on it.

2. (US) a filthy, unpleasant person, a ‘lowlife’.

2001

J. Stahl Plainclothes Naked (2002) 307: I’d love for some scrunge to try robbin’ the place, just so I could fuck him up legal.