LMDAO

laugh my dicklicious ass off

Sue: Omg, i saw some dude get hit by a train.
Me: OMG, LMDAO!!!!

LMDAO

Web-speak for "Laughing My Damn Arse Off". Derived from LMFAO, and also used in many of the same contexts as LMAO.

"My God, do you live near me? It's a small world! LMDAO!"

lmdao

Laughing my damn ass off

That joke was so funny, I'm lmdao.

LMDAO

Laughing my damn ass off

Lmdao the spider ate the frog that was really funny.