As a male's penis is in the female's vagina, the male chooses not to thrust. The Female then clenches the vagina and continues to have intercourse with the stationary man, simulating the feeling of a vigorous handjob.
"Oh Honey, I've had a long day at work and don't feel likely pleasuring me, can we do the singapore grip tonight?"
by Justin Friesen July 7, 2008
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