A game which is played by two males or females in which the participants where a XXXXL sweater and cover themselves with a comforter whilst pretending to be Siamese Twins and engage in the act of mutual masturbation. This raises the question: 'When Siamese Twins rub one out is it an act of masturbation or incest?'. Either way is is a rather disgusting act meant for homosexuals.
Fred: Hey Tom wanna go to the Mall?
Tom: No, I plan on playing Siamese Twins Game with my Cousin, Billy-Joe.
Fred: You're a disgusting fuck-bag, you know that?
by WTFPickles January 30, 2012

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