riot

(noun) a very funny or entertaining person, movie, television show, or thing

Example Sentence:

Dane Cook is such a riot, I love his comedy!

You should watch the movie Knocked Up, it is such a riot. I couldn’t stop laughing!

The Office is one of the funniest shows on TV. It’s a riot!

Similar idioms:

1. in stitches
2. LMFAO
3. hold one’s sides
4. show someone the ropes
5. crack up
6. show-off
7. tube
8. stop in
9. stop by
10. ROTFL