limhirof 

it means

Laughing
In
My
Head
Imagining
Rolling
On
Floor
(because you know when you say lol, sometimes you aren't really laughing out loud and when you say rofl, sometimes you aren't really rolling on the floor.)

A: "did u know pandas can burp?"
B: "omg, no way, limhirof!"
A: "I know isn't that just hilarious."

limhirof by S.M.Small-man October 6, 2010