Owtf 

Owtf= Oh, what the fuck?

Usually used to show surprise.

Guy1: Oh, by the way. I slept with your wife.
Guy2: OWTF!?
Guy1: Yeah, we got pretty drunk, and when we woke up next to each other in the morning we were both like "OWTF!?"

Owtf by Heetleer September 5, 2008

owtf 

the alternate way of saying Oh, What the fuck?

Person 1:owtf, you did not get get pwnt.
Person 2: Yep, I got PWNTZ.
Person 1: Go pwn yourself, n00ber.

owtf by Santa October 14, 2004