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1.
Pronounced {Om-Soul}

Abbreviation of Open Mouth Silent Laughter. This is when you laugh so hard that you just bend over with your mouth wide open, shaking without making a sound and just looking ridiculous.
"Amber just OMSLed off of her chair!"
by Velocirock January 15, 2010

Words related to OMSL

laughter lmfao lol rofl seizures
 
2.
SAME as PMSl except a typo.
Commonly used by drunks and idiots who cannot type.
How are you.....you twit OMSL
by snappy November 18, 2003