VIHAL
It means: Voices Inside Head All Laughing. It is used to express your feelings towards something very funny, in texts/IMs/Emails. Similar to LOL, but since people don't always "laugh out loud", VIHAL is appropriate for the situation.
"dude, today I fell down the stairs at school, and landed in a huge pile of gum."
"VIHAL!!"
"VIHAL!!"