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The act of actively laughing your ass off
He was too funny I was LMAOing !
Lmaoing by Jaduong kambuta August 4, 2014
Related Words

lmaonade 

derived from the acronym lmao, it is a stupid spinoff which makes no sense, but is pronounced "lemonade" to add some flavor
person1: i hate my life
person2: lmaonade!
lmaonade by nate November 24, 2004
Today I got high and thought of a new slang "lmaomg" during when I was laughing hard for no reason. Therefor I decided to be the first person to define it on urbandictionary.com.
However, I found in fact I was already the 14th wannabe...
Then I started laughing hard for a reason...
lmaomg by htp-rck February 11, 2008
If DavisMurphle told you this, he destroyed your ass in something.

lmaorgasm 

When you laugh and laugh your ass off, until you actually start to gain pleasure out of it.

background: lmao + orgasm = lmaorgasm
Timmy: Ha ha ha ha ha ha ha ha that's awesome, so awesome I can't even describe the feelings I'm going through!
Jerry: Well Timmy, that's obviously a "lmaorgasm".
lmaorgasm by oozabooman November 30, 2004

lmaonnaise 

The preffered condiment of internet sandwiches.
Oh shit, that flash animation was so funny I fucking shot lmaonnaise out of my fucking nose.
lmaonnaise by Col. Mustard March 16, 2005