Plum-shaped lobe, a term used to define the vagina, especially when the female is bending at the waist and showing her vagina from behind. Usually is shown when an underaged girl bends over while wearing a miniskirt.
Guy 1: Dang I just saw that girls plobe!
Guy 2: wtf is a plobe?
Guy 1: You know, when a girl bends over and exposes her vagina from the back.
Guy 2: Your perverted...wait so am I...Plobes rule!