bum (bums plural & 3rd person present) (bumming present participle) (bummed past tense & past participle )
1 n-count Someone's bum is the part of their body which they sit on.
(BRIT)
INFORMAL poss N
(=bottom)
2 n-count A bum is a person who has no permanent home or job and who gets money by working occasionally or by asking people for money.
(AM)
INFORMAL
3 n-count If someone refers to another person as a bum, they think that person is worthless or irresponsible.
INFORMAL, disapproval You're all a bunch of bums.
4 adj Some people use bum to describe a situation that they find unpleasant or annoying.
INFORMAL ADJ n
He knows you're getting a bum deal.
5 verb If you bum something off someone, you ask them for it and they give it to you.
INFORMAL Mind if I bum a cigarette? V n
6 verb If you bumaround, you go from place to place without any particular destination, either for enjoyment or because you have nothing else to do.
INFORMAL I think they're just bumming around at the moment, not doing a lot... V around
She went off to bum round the world with a boyfriend. V round n
beach bum (beach bums plural )If you refer to someone as a beach bum, you mean that they spend a lot of time enjoying themselves on the beach or in the sea. n-count
bum bag (bum bags plural )A bum bag consists of a small bag attached to a belt which you wear round your waist. You use it to carry things such as money and keys.
(BRIT) n-count
in AM, use fanny pack