Waning Gibbous

A post-nut boner which is in the descending phase resulting in a chub, but not yet fully flaccid.

Man, I nutted over a half hour ago and still have this waning gibbous.
How long ago did you nut dude? I can see your waning gibbous through your pants.
Nothing like walking around the apartment with a waning gibbous swinging around like a wrecking ball.

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