OMGWTFPWND
An expression of extreme excitement. Literally means "Oh My God, What The Fuck, PoWNeD". With powned being an expression derived from "owned". This expression is often used in the world of gaming.
Guy1: Dude, I just sniped some n00bs head from like 500 yards away.
Guy2: OMGWTFPWND! XD
Guy2: OMGWTFPWND! XD