English Reference

Word

bum

US/ˈbəm/

UK/bˈʌm/

Definitions

01the buttocks

B1 · Intermediate Countable noun British English · Informal

n. the part of your body that you sit on.

n. the buttocks. This usage is common in British and Commonwealth English but is considered childish or mildly impolite rather than truly vulgar.

“The toddler fell down right on his bum but didn't cry.”

“He spent the entire Sunday afternoon sitting on his bum watching cricket, much to the annoyance of his partner who wanted to go for a walk.”

Teaching tip

In British English, this is the standard informal word for 'bottom'. In American English, 'butt' is much more common for this meaning.

02a lazy or homeless person

B2 · Upper Intermediate Countable noun American English · Informal

n. a person who has no home or job, or someone who is very lazy.

n. a person who avoids work and lives on others; also used to describe a person experiencing homelessness.

“He's been a total bum since he lost his job and won't even look for a new one.”

“The local residents complained about the bums sleeping in the park, though the city lacked sufficient shelter space to house them.”

Teaching tip

This can be quite derogatory. Use with caution when referring to people in difficult social situations.

Synonyms

03to borrow for free

B2 · Upper Intermediate Informal · Slang

v. to ask someone to give you something for free, like a cigarette or a lift.

v. to obtain something by begging or borrowing without the intent of returning it. Often used with 'off' or 'from'.

“Can I bum a cigarette off you?”

“He managed to bum a ride to the coast with some students who were heading that way for the weekend.”

Synonyms

moochcadgescrounge

Antonyms

04to make someone sad

B2 · Upper Intermediate Informal · Slang

v. to make someone feel sad or disappointed.

v. to depress or dispirit someone. Almost always used in the phrasal form 'bum out'.

“It really bums me out that we can't go to the concert tonight.”

“The news about the budget cuts really bummed the whole team out, especially after they had worked so hard on the project.”

Synonyms

depresssaddenupset

05bad or broken

C1 · Advanced Informal · Slang

adj. of poor quality, or not working correctly.

adj. of poor quality, useless, or physically defective (such as an injury).

“I can't go hiking because I have a bum knee.”

“The mechanic told me the car was a total loss because of a bum engine that would cost more to fix than the vehicle was worth.”

Antonyms

Real-World Examples

“Simply, the party is able to put bums on seats again - and by that measure, things are looking up.”
BBC News 3 Oct 2026
“His end product needs work, but he will get bums off seats.”
The Guardian 6 Aug 2026

Idioms

Domain

Sports

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.B2 FirstIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.5.5–6.5TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 4.0–4.572–94TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.785–944
Frequency
Frequent
Level
B2 · Upper Intermediate
Updated

QR code

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English Reference