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When you are bout to bust a nut an your hitting it from behind so instead of busting on her you bust in your hand an sling it in her face an yell you been spidermaned bitch...
He sling but in my face an hollered I been spidermaned bitch!
The act of ejaculating in your hand, then proceed to bitch slam an unsuspecting victim.
Then I came in my hand, so I Spiderman Slapped the bitch.
To make the conscious decision after you blew your load to get rid of it by throwing it at someone, alike the way Spider-Man slings webs at his enemies.
Kyle: Yo dude, I was totally spidermanning people standing down on the street below from my balcony.
Sinon: That’s sick man...
Spidermanning is where you are about to cum and you pull out place your hand under your penis and say "my spider senses are tingling" and then you ejaculate
Note: it is best to also say "phwipp" while ejaculating for effect
Yo man i just finished spidermanning my girl
Noun. A handshake where one or more participants has semen on their hand.
J: He agreed to pay $35 to shake my girlfriend's hand.
R: There must be a catch, like he's going to give her a spiderman shake or something.
Vivbing while swinging around like spiderman
Tying a noose around your neck whilst jerking off. Usually improves the quality of the meat beating process. You need to go fast or else you might suffocate and die. Most recognizably known in the move Worlds Greatest Dad with Robin Williams.
Guy 1: did you hear that Bobby died yesterday?
Guy 2: omg no what happened?!
Guy 1: he was trying to do a whacky spiderman but was too long and he died.