A sock used for the purposes of masturbation, often found hardened and flaking, stuffed down the side of the bed in a teenage boy's room. Also the unfortunate name of a US professional tennis player.

Not to be confused with jock sack, a Scotsman's ball bag.

A pubic hair piece. A toupee for the pubic area/genitals. In the 1700’s when mercury was used to treat sexually transmitted diseases (Gonorrhea or Syphilis) one of the side effects was the loss of pubic hair. To disguise this condition, that was not cured by mercury, a Merkin was employed.