Definitions from Wiktionary ( )

▸ noun:  A small piece which breaks off from baked food (such as cake, biscuit or bread).
▸ noun:  A small piece of any other solid substance.
▸ noun:  (figuratively) A bit, small amount.
▸ noun:  The soft internal portion of bread, surrounded by crust.
▸ noun:  A mixture of sugar, cocoa and milk, used to make industrial chocolate.
▸ noun:  (slang) A nobody; a worthless person.
▸ noun:  (slang) A body louse (Pediculus humanus).
▸ verb:  (transitive) To cover with crumbs.
▸ verb:  (transitive) To break into crumbs or small pieces with the fingers; to crumble.
▸ noun:  A surname.
▸ noun:  Short for crumb rubber. [A form of recycled rubber with a granular consistency, generally from tyres after the removal of steel etc.]

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