Doppelganger + Bang
1. To engage in sexual relations with someone purely because they resemble someone else.
Ex. "Amy, don't you think it's a little creepy that Chandra is about to doppelbang that guy who looks exactly like our 70 year old, morbidly obese 4th grade teacher, Mr. Grundelstein? What is she trying to prove?"
Today's portmanteau submitted by Leena! Submit your own!