look up any word, like yeet:
 
1.
This is a simple abbreviation of the uncommonly used phrase "Laugh so much my sombrero falls into my nachos and cheese", this can be used in the context of a lol substitute as the actual lol acronym is slowly disappearing from msn and texts alike.
Person 1: Hey, guess what
Person 2: :O What?!
Person 1: I just got hit by a truck on my way home from work!
person 2: LSMMSFIMNAC
Person 1: this is why i hate you.
by Gavinisthecoolestpersonever April 17, 2010

Words related to LSMMSFIMNAC

lol