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A similar looking although considerably less attractive person who is included in activities in order to make their counterpart look better by comparison.

Doppelganger + minger = Doppelminger.

The doppelminger is often unaware of their status as doppelminger, or sometimes uses the relationship for their own advantages (for example, becoming cool by association)
Yeah but only because she's got her doppelminger with her.
by OhTheDamageIsDone October 11, 2010