An interjection said to a repulsive or irritating person. Oh, you crumb! How could you leave the house this filthy?I can't believe you tried to run the bill up on us, you crumb!
n. a repellent person. (From an old slang word for a body louse. Most of the crum(b) entries refer to lice or lousy.) The old man was a real crumb and tried to cheat us.
crumb-cruncher
and crumb-crusher
n. a child. How many crumb-crunchers do you have at home.