In British English, bum is a casual, slightly childish word for the buttocks — milder than “arse” and far less clinical than “buttocks.” It’s the word a British parent might use with a toddler, or a friend might use to tease someone who’s sat down too long.
But “bum” has a second life. In both British and American English, it describes a homeless person or vagrant — originally from “bummer,” a slang term for someone who idles. A “beach bum” isn’t homeless; they’re someone who chooses a life of leisure (usually surfing) over conventional work. To “bum around” means to wander aimlessly without purpose.
And then there’s the verb: to bum something is to borrow or beg it, usually small items — “Can I bum a smoke?” or “Bum a ride?”
Why It Matters
The dual meaning makes “bum” a linguistic curiosity. Same word, three distinct uses: anatomy, social class, and casual begging. Context determines which one applies, and British vs. American usage diverges significantly. An American hearing “I bummed a fag” might need a moment of cultural translation.
Examples
- “Get off your bum”: British for “stop being lazy.”
- “Beach bum”: Someone who lives for surfing and sunsets.
- “Bum a smoke”: To ask for a cigarette (British/Australian slang).
Related Terms
- Buttocks, arse, fanny
- Vagrant, hobo, tramp
- Beg, borrow, scrounge