I'm here to talk about the common used word "Lulz".
As many people know "Lulz" is a Sub-urban version of lol.
Most of the time, I see people posting "Lulz" everywhere.
This Urban Dictionary tells you more.
The "Lulz" became popular in the time of the portable chats. What's app/PingChat/BB-Messenger/Chatrooms/Shoutboxes Etcetera.
It was used on the Computer as well, but usually on Social Media. Facebook/MSN/Twitter.
Many people use it, when I'm on. I don't see the word lol in it, because some people typ it without the "z" what makes it even more weird. In my country (The Netherlands) we speak Dutch.
The dutch language is much like German, but in our country "Lul" means two things.
1~A Bad Word*
2~The manly genetalia.
So, please. Come to the Netherlands and use "lul" as much as you want to!