My wife approached me from behind and asked me "Do I look fat in this?"
Now I know the answer to this question so I had already answered it correctly before I had turned around to look at her.
"Phat is spelled P.H.A.T." she said. "It stands for Pretty Hot And Tasty."
"In that case you're definitely phat," I replied.
This question promises to be more and more difficult to answer in the future...