When you sit on your hand to restrict blood flow long enough to put your hand "to sleep". Then you masturbate with it. It gives the sensation of a second party giving you an hand job, since you have no feeling in your "sleeping" hand. Also known as just "the stranger".
Jack felt bored all afternoon, so he sat on his hands and gave himself a Happy Stranger.
by FakeMeat May 18, 2007
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