LSMISM 

Laugh so much I shat myself

Hahahahhaa ! Omg dats soooo funny!! piss-piss-piss-pissin maself. LSMISM LSMISM

LSMISM by CrazyCoolLOLLER January 8, 2010

LSMISOYNK 

Modern term like LOL or ROFL, meaning:

"laughing so much I stomped on your new kitten".

A popular phrase, which definitely needed shortening to an easy to remember version like LSMISOYNK.

Person 1: I found that bloke in a public toilet, "having fun" with baked beans

Person 2: LSMISOYNK

LSMISOYNK by Backrub the terrorist June 6, 2010

lshismp 

Laugh So Hard I Shit My Pants

That was so funny ilshismp.

lshismp by Jon February 8, 2004

lshism 

Laugh So Hard I Shit Myself

Danz: OMFG! You just raped my ears! You forcefully shoved info into them which I did not want!
Royal: lshism

lshism by Royal Celebi August 4, 2007

LSHISMGDOMFC 

Laughing so hard I spilled my grape drink on my fried chicken.

Used to imply the stereotype among black people loving grape drinks and fried chicken.

Black Guy 1: Why is 6 afraid of 7?
Black Guy 2: Why?
Black Guy 1: Because 6 is afraid of 7!
Black Guy 2:LSHISMGDOMFC!

LSHISMGDOMFC by Claps with one hand April 18, 2010

LSHISMB 

Laugh So Hard I Shit My Britches

Wow, you do a lot of blow!

LSHISMB!

LSHISMB by Marty McFriend June 4, 2005

LSHISMP 

I laughed so hard I shat my pants.

Kevin: Hey John, the dog just stole my wooden leg.
John: LSHISMP

LSHISMP by LachyGordon May 19, 2005