What is Dopplebanger?
1.
When you find someone doing porn who looks just like a friend, but said friend insists it isnt her rubbing one out on her webcam (though it probably really is)
"Hey is this (insert whatever porn website mysteriously popped up on your computer) you"
"No!"
"Are you sure?"
"Yes! It must be my dopplebanger. Why are you looking at asian porn?"
"Um.... got to, I have a phone call. fapfapfapfapfap"
See
2.
(n.) a guy who gets girls drunk and then has sex with them (usually in a darkened room) while pretending to be their boyfriend
dopplebang (v.): to intentionally get a girl so drunk that she has sex with you because she confuses you with her boyfriend
(n.) "Don't let Jack keep feeding you shots of Old Crow -- he's a well-known dopplebanger!"
(v.) Michele: "Yo, how did Bill manage to fuck Molly at that kegger when her boyfriend went to the bathroom?"
Michael: "He totally dopplebanged her!"
See