Top definition
1. The act of having sex with your mirror image

2. What Narcissus died pining for

3. Similar to twincest, but for those who don't have an identical twin

4. A future benefit of cloning technology
"Forget the Bel Ami twins. Scroll down and you will discover hardcore Colby on Colby action. Narcincest?"

"Dave Franco Fucks Himself"

"Colby can fuck himself on the Doily Penis"
by kinsey3 November 01, 2011
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