A slang term for marijuana in reference to the character Mary Jane from Spider-man. Another way for asking for marijuana with this term is asking to watch the Spider-man movie.
Dude: Hey you got any spiderman on you?
Guy: Cheya, but its some danky ass spiderman.
Dude: Hey wanna go watch spiderman?
Guy: Nah, I'm all out of spiderman.
Verb: As in "to Spiderman", meaning to ejaculate into your hand and fling the "web" (semen) into a girl's face. When "Spidermanning" a girl one must be certain to make the Spiderman hand move (similar to the "I love you" sign).
while doing a girl up the butt, if you spit on her back and she turns around the term is called a peter parker. but if she does not turn around, it is refered to as a spiderman