Top Definition
A sex act in which multiple people have sex with a woman, and one male starts from the other end of the room when another male is already penetrating the woman and the male from the other end of the room jumps and kicks her in the mouth and makes her bleed. If he doesn't at first attempt he has to retry.
Why did Paige have messed up teeth?

She went all out with the Siamise Kangaroo.
by Redeer January 15, 2010

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