LMAO

laughing my ass off

Example Sentences:

A: Did you see that funny youtube video?
B: LMAO, it was hilarious!

When I went to the comedy club, I was LMAO. The comedian was hilarious!

From the Blogs:

LMAO High Unemployment Rate Means Increased DJ School Enrollment

Media:

Similar idioms:

1. LMFAO
2. ROTFL
3. LOL
4. riot
5. in stitches
6. laughter is the best medicine
7. hold one’s sides
8. smart ass
9. kick some ass