from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An objectionable or foolish person.
Sorry, no etymologies found.
(So, basically, the guy who has vowed to have a respectful dialogue with any crumbum Third World dictator is now threatening to steamroll over tweedy American college presidents - but that's another story.)
Assuming that the intention of “you’re a minority” was what your student perceived it to be, it wouldn’t have been inappropriate for him/her to say to the one who said it, “Hey you crumbum - yeah I’m a minority.
"Don't let this crumbum talk you into doing his dirty work.