Elaborated version of the term flange, refering to a woman's vagina

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.

This is actually the definition of a lady's mimsy

often mistaken for a rude word when infact it means a rare sharp object on the end of a jiblette