lwu 

IM acronym for "Laughing with you"

DJ: This is ridiculous, lol
Me: I know, lwu.

lwu by Karen Diva ATL April 24, 2008

LwU_!@U 

I'm laughing with you; not at you.

We both know what you meant to say. LwU_!@U

LwU_!@U by The Infamous Din July 1, 2019