doppelwolfer 

Noun, When there are two sisters that from behind look exactly the same,except one has the face of an angel and the other a gargoyle.

Dude I'm not going out with the doppelwolfer just so you can bang her hot sister.

doppelwolfer by Dr. Jekyll&Mr.Hyde December 28, 2018

Doppelwalker 

Someone who shares the same walk as a specific other person

Did you see how he was walking? Just like Dave! He’s his doppelwalker!

Doppelwalker by Keyhole Tony June 1, 2018