lmfnso 

laughing my fucking nut sack off

Is that A drunk cat?? LMFNSO!!!!

lmfnso by neptunerav August 5, 2007

LMFNO 

An abbreviated form for the phrase, “Laughing My Fucking Nipples Off.” Its purpose is to create a more expressive illustration of great laughter or amusement, similar to LMFAO (which means, "Laughing My Fucking Ass Off.") The term is commonly used on the Internet, online and conversations across gaming/chat rooms or texting.

Girl: Do you believe in puppy love?
Boy: I tried it once, but their assholes are too small.
Girl: LMFNO!

LMFNO by samcaba January 10, 2011

LMFSO 

It stands for Laughing my fucking socks off.
Or also a commonly made mistake
when trying to type LMFAO.
:D

1 Person: ~tells a funny story~

2 Person: Hahaha I'm LMFSO now.

3 Person: ROFL

LMFSO by iAcidic April 4, 2009

Lmfso 

Laughing my fucking sack off

That joke was so funny I that I’m laughing my fucking sack off (Lmfso)

Lmfso by Psychoticdingus May 8, 2018

lmnso

laughing my nut sack off

Keem: yo,she looks like she just got done workin the corner.
Rel: lmnso. yea she does

lmnso by *Misz Ind3P3nD3nT* June 11, 2010

Lmfsombf 

Laughing my freaking slime off my butt fucker

That was so funny lmfsombf

Lmfsombf by Bigenglishballs June 15, 2019

LMFBSO

Laugh My Fucking Ball Sack Off

LMFBSO @ Rob's stolen images and Miss E's fat ass.

LMFBSO by Keystone80435 September 18, 2007