when a girl follows a guyaround as if she is his shadow. Usually a ugly bitch, or a creepy girl who wants to rape you. Doesn't talk just stands there and follows.
guy 1: hey lets go to the club guy 2: Hell nah theres gonna be dick shadowing going on there
guy 1: yea your right megan is gonna be there
When playing first person shooters (multiplayer) and have a lightweight rushing class, you can flank the opposing team from the side killing an enemy (or enemies) giving them the "Shadow Dick."
"Dude, did you just flank the fuck out of them?"
"Fuck yeah, gave them that shadow dick bruh."