Verb describing a rare phenomenon occurring between two men whereby the man administering butt sex to the other performs a rusty trombone (it is the courteous thing to do), catches the sperm in his hand, slaps the receiver in the face with his jizz-filled hand, and slowly pulls his hand away to create a web-like effect. And hence, man #1 has spidermanned dat dude. This phrase was popularized by the underground rap sensation Cabin Boy's song of the same title, "Spiderman dat dude (9/11 I'm sorry...)(Cabin Boy Tell'em)."
"Sweet sassy molassey, look at those hot buns over there! I would sooo spiderman dat dude!"
by Monkey Butter December 18, 2007