Houdini Booty
When her ass disappears from a back view but reappears from a side view
Guy 1: Bro I thought her ass was flat but when I saw her from the side her ass was fat
Guy 2: Nice
Guy 1: Turns out she just had a Houdini Booty
Guy 2: Nice
Guy 1: Turns out she just had a Houdini Booty