Placket

[Couch Potatoe]

A petticoat, esp. an under petticoat; hence, a cant term
for a woman.

[Julian]

[petticoat], also connotes vagina.

Citation: [Penguins] Troilus and [Cressida], edited by Jonathan Crewe, 2000, pp. 49.19.

[Kit]

An opening or slit in a garment, covering fastenings or giving access to a pocket, or the flap of fabric under such an opening.