- Brit. informal a person's buttocks or anus〈英, 非正式〉（人的）屁股; 肛门。
短语
bums on seats
- the audience at a theatre, cinema, or other entertainment, viewed as a source of income观众。
词源
late Middle English: of unknown origin.
informal <非正式>
N. Amer. <北美>
1
- a vagrant流浪汉, 流浪乞丐。
1.1
- a lazy or worthless person懒汉, 废物：
you ungrateful bum.
你这忘恩负义的懒鬼。
2
- in combination a person who devotes a great deal of time to a specified activity迷恋某项活动者：
a ski bum
滑雪迷
a dance bum.
舞迷。
verb
bummed, bumming
1
- no obj.（一般作bum around）chiefly N. Amer. travel, with a particular purpose or destination〈主北美〉（有目的或有目的地的）旅游：
he bummed around Florida for a few months.
他在佛罗里达一带游玩了几个月。
1.1
- pass one's time idly闲荡, 虚度光阴：
students bumming around at university.
在大学里混日子的学生。
2
- with obj. get by asking or begging乞讨：
they tried to bum quarters off us.
他们向我们讨二角五分的硬币。
3
- with obj.（一般作be bummed out）N. Amer. make (someone) feel upset or disappointed〈北美〉使心烦; 使失望。
短语
give someone（或get）the bum's rush
1
- chiefly N. Amer. forcibly eject someone (or be forcibly ejected) from a place or gathering〈主北美〉（被）驱逐。
1.1
- abruptly dismiss someone (or be abruptly dismissed) for a poor idea or performance（因想法或表现差而）突然解雇某人（或被突然解雇）。
on the bum
- N. Amer. travelling rough and with no fixed home; vagrant〈北美〉过流浪生活。
词源
mid 19th cent.: probably from BUMMER.