Double yew tee ef 

Wtf spelt out how its pronounced. Also, if you want to be proper gangster you could write 'double yew tee ef m8', which adds a certain ring to it.

Person 1: Are'nt you like gay or something?
Person 2: DOUBLE YEW TEE EF M8!
Person 2: ...
Person 2: Yes V_V

Double yew tee ef by Div_658 December 8, 2005

double-yew tee eff 

1. same as wtf

2. suggests that you actually said wtf

Usually used with a question mark.

And Australia's still down there like, "Double-yew tee eff, mates?"

double-yew tee eff by er!ka Dorkface October 1, 2006