It's a "Waray" term for
vagina.
(Waray is a
Philippine dialect used in some parts of Samar and Leyte provinces).
Other terms used: Puday, Puyet, Pukangkang, Puklo, Pipi, Dangdang
Hoy, pag-panty didto! Nakikita it im pudangdang!
(Hey, put on your panty! Your "pudangdang" is visible!)
This
sentence is
usually heard from a mother telling her young
daughter to put on her panty.