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This can mean two different things.

1. Kiss My Fucking Sugar Lips

2. Kill My Fucking Self Laughing
1. I'm soooo cute! Kmfsl♥
2. Did you see that girl get her ass beat? Kmfsl!
kmfsl by meowmeowkittycat September 8, 2012
Related Words
kmfnl KFNL kmfn kmfsl
Kentucky Fried Nigger Lips. As black people have large lips and like fried chicken, it is common to combine the two.
Person 1: Yo, Tyrone got some big ol lips.
Person 2: Awwww sheeiittt he got them KFNL.
KFNL by penis enlarger March 4, 2017
Kmfn means "kill me f***ing now". It's a more intense version of "kmn", which is "kill me now". The f***ing can be substituted for words like, freaking, fudging, fluffing, etc.
Guy 1: Hey, we have extra homework tonight..
Guy 2: Seriously? KMFN
kmfn by Whyareyouasking? November 27, 2017