## Meanings
1. The part of the body you sit on; the buttocks
2. A person who is lazy and does no work
3. To get something from someone for free, especially by asking
4. To spend time doing nothing useful

## Examples
- Sit on your bum and try to touch your toes.
- Get off the sofa, you lazy bum.
- Can I bum a cigarette off you?
- I'll probably just bum around the house all weekend.

## Roots and Affixes
- Root: bom

## Etymology
Attested since the 1300s, as Middle English bom (found in John Trevisa's 1387 Translation of the 'Polychronicon' of Ranulph Higden, "his bom is oute"), of uncertain origin. Sometimes suggested to be a shortening of botme, botom, bottum (“bottom”), but this is contradicted by the fact that bottom is not attested in reference to the buttocks until the late 1700s. Suggested by some old and modern references to be onomatopoeic. Compare also Old Irish, Scottish Gaelic bun (“base, bottom”). The anal sex senses (noun and verb), as well as the adjective (esp. the first) sense, are expletive-avoiding (…

## AI Etymology
Bum is attested since the 1300s, as Middle English bom (found in John Trevisa's 1387 Translation of the 'Polychronicon' of Ranulph Higden, "his bom is oute"), of uncertain origin. Sometimes suggested to be a shortening of botme, botom, bottum (“bottom”), but this is contradicted by the fact that bottom is not attested in reference to the buttocks until the late 1700s. Suggested by some old and modern references to be onomatopoeic. Compare also Old Irish, Scottish Gaelic bun (“base, bottom”).

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