To lulz is the act of "lulzing" which is laughing uncontrollably while you are under the influence of alcohol, drugs etc... You may lulz out of random, even when something funny does not happen. Lulzing has no limits! Lulzing also may include crying out of pure laughter, spitting out your drink/having it come out through your nose, ROFL-ing (literally) and most importantly, saying the word "lulz" out loud and/or using it in a sentence while laughing.
While smoking weed, Rory told Carlie she "wants to watch Treehouse, because she is baked out of her mind". While this is not particularly funny, Carlie proceeded to lulz and said "I am lulzing up a storm" through tears of pure joy.
by queh September 4, 2010
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1. A term used to justify ridiculous, pointless and occasionally gratuitous behaviour.

2. Personal justification for the life of an internet troll.
Example 1:
Guy 1: Dude, why did you senselessly murder that guy with an axe while listening to Huey Lewis and the News?

Guy 2: Ah, you know, for the lulz.

Example 2:
Guy 1: So, you were playing World of Warcraft till 4:00 in the morning just so you could follow that one guy around and annoy him?

Guy 2: Yeah.

Guy 1: ...

Guy 2: For the lulz.

Guy 1: Get help.
by Shadowy February 17, 2011
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It's what you do things for.
Why post a giant image of 50 Hitlers?
I did it for the lulz
by Another Anonymous March 18, 2007
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The one answer to all "why did you..." questions. When writing, lulz MUST be in all lowercase. Also see lulz
Why did you touch that pencil? For the lulz
Why did you rape that woman? For the lulz.
by Kale S. December 4, 2008
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Lulz is a typographical subversion of the word "lol", meaning to Laugh Out Loud, thus emphasising the humour derived from the subject by way of making the original word sillier.
Megalulz ensue.
Citizens of Hiroshima and Nagasaki: "Why Truman? Why the bomb? It killed thousands of innocent women and children"

President Harry Truman: "I did it for the lulz"
by Jamie Davidson January 2, 2008
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Lulz is awesome. Lulz is way better than lol. Lulz is a synonym for Schadenfreude and means "lol derived from other's suffering".
Osama, on WTC: I did it for teh lulz!
by TehCezar December 17, 2009
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