LOLZ

Etymology
(Initialism of laughing out loud.) + (Eye dialect spelling variant of the plural suffix .)

Usage notes
The final serves only to make the acronym look like a plural noun, or, more commonly, as a mockery of those who use  to pluralize other nouns, as opposed to. The mockery of such people is often not done in any kind of specific context, but usually as a way to lighten up a conversation.