Where you shove your fist up someone’s pussy and hold them up by your first and throw them off by fist pumping the air. Usually not for pleasure.

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.