When a women has her vaginal discharge all over the place, like everywhere, the walls, the roof, your mouth. Can result in spontaneous slippery slides.
Common causes of this: too much probing and PMS.
How to avoid: Use a wet vac when probing
Guy 1: She just ash-watered everywhere!!!
Guy2 : its like a water park in here... weeeeeeeeee!!!
A girl: I should have brought an extra pair of undies, I just made an ash-water!!!