Describing the vaginal area of a girl who doesn't get any action. In other words, her pie is dusty.
Guy1-"God damn Shaniqua is such a prude bitch."
Guy2-"Hell yeah, she has the dustiest pie in school!!"
Guy1- "Laquisha definitely has a dusty pie; she won't fuck me for shit!!"
Guy2- "Sorry to tell you this man but i hit that box every day."