Zinger (noun)

1. A remark or statement that is clever and often surprising and tends to have a strong impact on the listener or reader.
2. A remark that is intended to be funny or amusing but is often seen as being inappropriate or hurtful.

Origin:

The word "zinger" is thought to have originated in the united states in the mid 20th century and its origin is uncertain.

Examples:

1. She had a zinger for every occasion.
2. That was a zinger, I didn't see that coming.
3. He had a reputation for delivering zingers in debates.
4. The comedian had a knack for delivering zingers.
5. The host had a few zingers prepared for the roast.