A small piece which breaks off from baked food (such as cake, biscuit or bread).

A small piece of any other solid substance.

(figurative) A bit, small amount.

Short for crumb rubber.

The soft internal portion of bread, surrounded by crust.

A mixture of sugar, cocoa and milk, used to make industrial chocolate.

(slang) A nobody; a worthless person.

(slang) A body louse (Pediculus humanus).

(transitive) To cover with crumbs.

(transitive) To break into crumbs or small pieces with the fingers; to crumble.