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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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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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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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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A phrase in which /b/tards use to say they did something that was funny.
I humped a pole for the lulz.
by Unknown343213 August 28, 2008
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