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The act of keeping your dick hard when in the process of masturbating (burning one off). Accomplished by cupping your hand and letting your fingers hang resembling that of a spider and stroking the head up and down with your fingertips. AKA The Spider
When you are in the restroom and someone comes in and you were masturbating. In order to keep your dick hard (quietly) until they leave, you would use the spider.
by Chew Dogg December 22, 2005
When a guy sticks his thumb up a girl's ass from behind (likely while fucking her doggy style) and lets his fingers rest on her upper ass/lower back (possibly tapping his fingers making it even weirder). This makes it seem to her as though a giant spider is crawling up her ass. Most likely done by inexperienced individuals.
Jen: So I heard you fucked Joe? How was he?
Jamie: Uhhh...ok I guess, he kinda weirded me out by doing the spider though.
Jen: Fuckin amateur, lets make out.
Jamie: Uhhh...ok I guess, he kinda weirded me out by doing the spider though.
Jen: Fuckin amateur, lets make out.
by Gamblar December 10, 2006
The act of keeping your dick hard (accomplished by cupping your hand over the head and massaging your shaft with your fingers, thus resembling a spider) while masterbating in a public restroom when someone walks in until they leave.
by x Chewy x September 04, 2018
by Space-Penis Super-Gear February 05, 2011
by Kel B July 27, 2006
by freshco May 02, 2005