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The position of female masturbation/fingering in which her middle and index finger are moved consistently inside of her vagina in a trigger movement, resembling the finger movement that Spider-Man uses to shoot webs (this position can also be used by a male to the female).
-Person 1: I walked in on her spider-man grip fingering herself HARD dude
-Person 2: wow. H O T.
via giphy
by super mega masturbator oarlock October 04, 2018
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