In the film, Easy A, Olive has a conversation with her parents like this:
OLIVE: What would my punishment have been otherwise?
DAD: Bed without supper, I guess.
OLIVE: But I'm already finished.
MOM: No dating, no dating.
DAD: Yeah, no dating. No dating for you, young lady.
OLIVE: I think my complete lack of allure already kind of shot that horse in the face.
Does anyone know the meaning of this phrase? What situation is Olive trying to describe?