A hillbilly corncob is when your anal sex partner eats a lot of corn prior to anal sex and when you pull your penis out of partner it is covered with corn. The corn remnants resemble a corncob that has been eaten by someone with very few teeth.
"My girl loves to eat corn, but after anal sex last night, my dick looked like a hillbilly corncob."
by Yapester April 21, 2015