Top Definition
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
3 more definitions
(Originally found on a "Teen post" or "So relatable".)

An acronym for "Laughing silently in my head because it wasn't funny enough for me to actually laugh out loud", this rather new form of internet slang is commonly used by honest, smart people that have chosen to react to something slightly amusing to them in place of "lol" which is an acronym for "Laugh our Loud", as, according to the definition of "lol", few people are actually 'lolling' when they type lol, and so, the use of LSIMHBIWFEFMTALOL is a much more honest term.
Ellen finds yet another "funny" cat picture on the internet. Pressing the 'Reply' button, she types in "LSIMHBIWFEFMTALOL"
by starsVSroses May 05, 2015
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
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

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