crumbum

and crumbbum (ˈkrəmbəm)

1. n. a repellent person; a bum or hobo. (A crumb(y) bum. See note at crumb. The hobo may be infected with lice.) A skid row crumbum asked us for a buck.

2. mod. inferior; lousy. I sent the crumbum food back to the kitchen. There was a bug in it.