Oxford Advanced American Dictionary

Definition of bum verb from the Oxford Advanced Learner's Dictionary

bum

verb
bum pronunciation English bʌm bum pronunciation American bʌm
 
bumming, bummed1 bum something (off somebody) (informal) to get something from somebody by asking
Synonym
cadgeCan I bum a cigarette off you?2 bum somebody (out) (North American English, informal) to make somebody feel upset or disappointed
Phrasal verbs

bum around/about

(informal) to travel around or spend your time with no particular plansHe bummed around the world for a year.