Green’s Dictionary of Slang

crumbum adj.

[crumbum n.]

(orig. US) useless, awful, second-rate, inferior.

[US]J. Adams From Gags to Riches 93: He [...] is always on hand when any of his crum-bum pals opens in a night club.
[US]W. Brown Teen-Age Mafia 102: The place was a real crum-bum dive.
[US]S. Longstreet Flesh Peddlers (1964) 15: Who needs their crum-bum television series?
Kirkus Reviews 1 Sept. 🌐 Forget who killed crumbum Mark Biscardi, and all those others.
NewYorkMetro.com 4 Mar. 🌐 Aditi’s heart belongs not to her betrothed (Parvin Dabas), an intelligent, straitlaced engineer based in Houston, but to her ex-boss, a crumbum TV host twice her age.