- 1 bum something (off somebody) (informal) to get something from someone by asking Can I bum a cigarette off you?
- 2 bum somebody (out) (informal) to make someone feel upset or disappointed Phrasal Verbsbum around
NAmE//bʌm//Verb Forms present simple I / you / we / they bum
he / she / it bums
past simple bummed
-ing form bumming