When a guy does a girl doggie-style in front of a window, then at some point he gets a friend to trade places with him. He runs outside and up to the window, knocks on the glass, and yells HOUDINI! while waving to his girl.
I got Rick to help me pull a Window Houdini on Stacy last night.
by Max March 8, 2005
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You bend a girl over in your bay window and do her from behind while your brother or friend is over, switch with your friend/brother and let them do your girl then run outside naked and wave to her from the outside the window.
"hey man this girl is coming over tonight, want to give her the bay window Houdini?"

"Man last time we did that she tried to rip my dick off"
by superb ninja September 29, 2009
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