A bum is defined as a person who is lazy and does not work by choice.(noun)
An example of bum is a person who lays around drinking all day and doing nothing productive.
Bum is slang for borrowing without planning to return.(verb)
An example of bum is to take $5 from a friend and never give it back.
The definition of bum is of poor quality, ailing, or false or invalid.(adjective)
An example of bum is a broken limb.
See bum in Webster's New World College Dictionary
Origin: < bummer, prob. < Ger bummler, loafer, habitually tardy person < bummeln, to go slowly, waste time
Origin: ME bom < ? botem, bottom, as Du dial. boem < bodem, & obs. E bummery for bottomry
See bum in American Heritage Dictionary 4
Origin: Back-formation from bummer.
Origin: Middle English bom.
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