1. In reference to the great escapologist, Harry Houdini, who popularized the disappearing act; Any female who loves you, leaves you, and then wants you back. A Hudini, usually around the age of 18 or 19, will act totally interested in you one minute then disinterested the next. Often times a "Houdini" will initiate conversations (whether it be in person, facebook, or text) and suggest wanting to hanging out, but then disappears on you when you least expect it.

2. A flaky, two-faced, inconsiderate female. She almost always acts unaware of her inconsistency. The men who fall victim to these "Houdinis," are warned to undo the leash tied around their neck and abandon ship before he falls victim subsequent times. Those who are deemed a "Houdini" must be called out on it, preferably in person and without apology.

As a man reaches climax whilst in the "doggie style" position, the man pulls out and spits on their partner's back, fooling them into thinking that he has ejaculated, however, when their partner turns around, the man lets loose his baby yoghurt in his partner's face.

a houdini can also refer to a sex act where a male, who is fucking a chick doggy style in front of a first floor window, quickly pulls out, and his friend jumps in to continue banging her. the first man then proceeds to run naked and dance in front of his bitch outside the window. magic, eh?

nonetheless, the more accepted defineition is the genuine spit and skeet technique.

When having sex doggy style, when the guy is about to ejaculate, he pulls out and then proceeds to spit on the girls back so that she turns around, and blows it right in her eye.

Named for the infamous magician, the houdini is a sexual act in which a male engages his partner from behind and prior to ejaculating he pulls his penis out and spits on his partners back to simulate ejaculate. When his partner turns around he then ejaculates into his partner's face.

When a man has sex with a woman so that he is behind her and she is facing a window. The man has his friend hide in the in the room and during the middle of the act the man pulls out and his friend takes his place so that the woman does not notice. The man then runs outside and waves to the woman from outside of the window.

when you're fucking a girl from behind and she's facing a window. You withdraw quickly and have a buddy slip in, meanwhile you walk out side and wave to her through the window

The act of disappearing without warning whilst out clubbing or at a party with a group of friends. The disappearance being like that of Houdini's magic act; also known as "Pulling a Houdini".