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1.
The only reason anyone does anything
Person 1: Why did you did it?
Person 2: I did it for teh lulz.
by Max M. [JET] August 14, 2008
 
2.
The act of doing something that makes you laugh or amuses you.
"Why the hell did you break my camera?!"
"I did it for teh lulz!"
by MindDemon666 September 06, 2008
 
3.
For the laughs or for the entertainment.
I know it seems stupid, but at the time I just did it fortehlulz.
by EmEfBot August 02, 2010