Just when you thought you'd seen everything on the net...
I've seen more TLAs (Three letter acronyms), ETLAs (Extended three letter acronyms), smileys, and shortcuts than you could wave an RFC (request for comment at)...
But I have to admit... this one was a new spin to me. It garnered quite a chuckle:
Some of you know LMAO
Some know ROTF
ROTF - LMAO - Scaring the cats.