An expression to point out that a female in the room has erect nipples. Typically used for a woman with particularly large nipples like those of a temperature indicator on a turkey in the oven that pops up when the bird is done.
RuPaul says it on the RuPaul's Drag Race. Ru says it on the tv "she done already done had herses" and then she gives the players a little hint about the today's mini challange.