A secondary posting identity of a regular poster on an internet message board. A poster may develop several different doppels using different email addresses in order to troll and make comments that he wouldn't make when using his primary username.
Origin: The Motley Fool Discussion Boards
JoeBob has 438 doppels. Some examples: JoeShmoe, JimBob, JoseRoberto, JimeRoberto, SaddamHater, FatMan15, PoopyHead, etc.
White cock with black balls on a chink. Usually causes good sex.
Man I fucked that chink with the skeetnet last night it was so wonderful I blew me load all the way to china.
When, without your knowledge, someone has already posted a message to an internet message board that contains principally the same content as what you've just posted.
Agh! TrippinDude already posted the defintion of "doppel!"
I've been greeked!