Y.D.W.T.W.H.B.Y.D.
An abbreviated way of writing to a friend about someone you like but don't want everyone to know. "You Don't Want To Want Him But You Do."
Melissa: Oh god Lacy!? Why are you always sniffing around that looser?
Lacy: oh, Melissa, I don't know he's just Y.D.W.T.W.H.B.Y.D. there's no good reason why.
Lacy: oh, Melissa, I don't know he's just Y.D.W.T.W.H.B.Y.D. there's no good reason why.