A doppleganger is a shape changing monster who can feed upon another while taking his very identity. The doppleganger is a gangly Medium-size humanoid with slick skin and white eyes with no pupils.
The doppleganger's features twisted and formed until they took the features of its latest victim.
by Doppleganger July 17, 2003
The act or idea of 2 or more people being on opposite sides of a person and slamming into him/her at the same time why shouting out "DOPPLEGANGER!"- usually done to an unsuspecting individual.
Alex, John, and Chris are walking down the street, talking about random shit. Alex slowly falls back and gets on Chris's left side while John remains on the right. At exactly the same moment, they signal each other and slam into Chris while yelling "DOPPLEGANGER, Biatch!!" and causing extreme pain. They then laugh for about 5 minutes while Chris falls to floor and recuperates.
by Alex Q. February 21, 2005