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.
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"
President Harry Truman: "I did it for the lulz"
by Jamie Davidson January 2, 2008
 Get the Lulzmug.
Get the Lulzmug. by Sam Brooks 412 December 28, 2010
 Get the Lulzmug.
Get the Lulzmug. by Anonemus August 3, 2007
 Get the Lulzmug.
Get the Lulzmug. by stevecro October 7, 2010
 Get the Lulzmug.
Get the Lulzmug. by cybz0r August 5, 2007
 Get the Lulzmug.
Get the Lulzmug. A version of 'lol'.  The term was originally coined by the gays, but little squeaky-voiced boys on the internet started using the term as well.
by Tim Christenson January 28, 2009
 Get the Lulzmug.
Get the Lulzmug.