The act of post-sexual activity, after engaging in an orgasm, and forgetting what happened before the nocturnal emission, and/ or ejaculation, occurred.
Person 1: So I was fucking my wife, right? And then we stopped, and I wanted left overs for dinner, but forgot what we had! Damn Cumnesia.

Person 2: Dude I know what you mean, bro!
by BobbyBaja December 20, 2009
9 Words related to Cumnesia

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