a man’s hairstyle that is bald on the top but with long stringy hair hanging over the collar in the back (elderhostel up front, party in the back)
This is a modification of the 80’s mullet. It is worn by the diehard that refuses to give up the long hair that he sported back in high school.
Bob: Did you see Jim Rickards on Fox Business talking about the demise of the US Dollar?
Dave: Is that the guy with the waning mullet?
Bob: Yeah, that’s him.
A post-nutboner 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.