Arse (noun)

The buttocks or anus.

Origin:

Originated from middle english 'ers', and is a vulgar slang term for the buttocks or anus.

Examples:

1. He gave me a slap on the arse.
2. She bent over and showed her arse.
3. He's got a sore arse from sitting too long.
4. Don't sit on that dirty bench, you'll get your arse dirty.
5. She wiggled her arse to the music.