Green’s Dictionary of Slang

(US) filthy, disgusting.

1971		T. Thackrey Thief 245: I was fucking well tired of living in crudball hotels.
1989		‘Joe Bob Briggs’ Joe Bob’s America 20 Oct. 🌐 And now they sailed a loaf of overcooked crudball Frog bread at Donald.
1997		Simon & Burns Corner (1998) 71: A crudball act that consistently yields a profit can easily rise in stature. It becomes, in corner parlance, a dope-fiend move.