look up any word, like rusty trombone:
 
1.
Laughing silently in my head because it wasn't funny enough for me to actually laugh out loud
Boy: Hi, whats up
Girl : Nothing much you?
Boy: I can't remember if I was drunk or high
Girl: LSIMHBIWFEFMTALOL
by fuckfuckfuckatyfuckfuck June 22, 2011
79 12
 
2.
The abbreviation for, 'Laughing silently in my head because it wasn't funny enough for me to actually laugh out loud'
This is said when you don't to text LOL because the joke wasn't that funny.
Hairy: "Why was 6 afraid of seven?"
Justin: "Why?"
Hairy: "Because 6 is a pussy."
Justin: "LSIMHBIWFEFMTALOL"
by Ring King June 06, 2013
4 1
 
3.
Laughing silently in my head because it wasn't funny enough for me to actually laugh out loud
You're so funny lsimhbiwfefmtalol
by Valeskia May 18, 2014
1 0