1. When a pube gets caught beneath one's foreskin. This can be very uncomfortable and even painful should the penis become erect, thus pulling at the hair. Then the pube stretches out, forming a little tight string like a harp.
2. A harp with strings made out of extremely long pubic hairs.
1. "Holy shit, this pubic harp hurts like a bitch."
2. "Dude, have you heard Ronny play that new pubic harp he bought? It's disgusting as hell, but beautiful."