General terms:
* Quip: This is a classic choice for a short, witty remark.
* Bon mot: A French term for a witty remark, often used to describe something clever and memorable.
* Repartee: A quick, witty exchange between two or more people.
* Epigram: A short, clever, and memorable saying, often with a satirical edge.
* Aphorism: A concise and memorable statement of a general truth or observation.
More specific terms:
* One-liner: A short, humorous joke or observation.
* Punchline: The final, often witty, statement of a joke.
* Zinger: A sharp, witty remark that is intended to be humorous or sarcastic.
The best word to use will depend on the specific context and the tone you want to convey.