A French colloquialism used to describe a woman's vagina(or the woman herself) that smells as if a mortally wounded bum crawled inside of it 23 days ago and died, creating a stench powerful enough to cause a man to leap from a 14th floor window.
I got drunk a Loreilei's this weekend and woke up next to a leap hole. I puked in my boots, put them on, and leaped out of the window. Luckily, her husband's Ford Ranger broke my fall.