Ass is a versatile English word with multiple meanings:
1. Literal meaning: The buttocks or rear end of a person or animal
2. Slang usage: Can mean "idiot" or "stupid person" (e.g., "Don't be such an ass")
3. Vulgar expression: Used in phrases like "kick ass" (to do something very well) or "pain in the ass" (something annoying)
4. Animal reference: A donkey (though "donkey" is more commonly used)
5. Internet slang: Often used in memes and online conversations for humorous effect