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When a couple has been together for too long and start to resemble each other. Not just in how they act or dress but actually physical similarities.

Owners and pets can have the same problems.
Nora and Ben have been together for 60 years. Nora and Ben have the same face. Ben is slightly taller than Nora and Nora has a vagina.

Nora and Ben have a Uniface
by The Scuzzy one June 22, 2011
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