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1.
someone with two wangs that are alike down to the happy hairs and semen spray qualitys
eat my cookin dopplewanker biatch!!
by Wee-Noss poopmaster February 18, 2004
 
2.
In pornography, when a male star uses someone else's penis for various shots instead.
I swear, he was using dopplewangers in that clip.
by rightlung August 19, 2008