Lulz

From Bibliotheca Anonoma

A nominalization of the acronym LOL. Essentially laughter (usually at someone or something’s expense). An equivalent word would be schaudenfreude.

Usually, Anonymous's goal is to do it for the lulz.

The word lulz originated when "DESU" was wordfiltered to lulz. It's current meaning was defined after the FOX News report on Anonymous.