What is One-and-a-halfsome?
1.
Secks between a normal-sized person and a midget.
A twosome would involve two normal-sized people, so therefore a one-and-a-halfsome would involve a normal-sized person and a person half the size of a normal person, or a midget.
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Game in which two people grip hands like they were arm wrestling, but instead they take turns slapping each others hand as hard as possi..