McDoppelganger

Your fat doppelgänger; a fat look-alike. Derived from "doppel" being German for "double" and fatties frequenting McDonald's, likely ordering McDoubles.

A: Oooh, that girl looks like Rebecca Romijn plus 50 lbs.

B: Must be her McDoppelganger.

by chuntheman2001 September 2, 2013