When a female is giving a blow job to a male and he climaxes all over her face, he then pushes her down the steps.

To drink from someone else's bottle/cup by letting the liquid "waterfall" into your mouth. Waterfalling allows for you to drink without letting your lips touch the bottle/cup.

a weed smoking utensil made of a 2 liter pop bottle. like a lung you put a bowl on the top. also you make a hole at the bottom. you fill the bottle with water and the bowl with weed, cover the hole with your thumb. when you start to light the weed release your thumb from the hole and the water will being to drain casuing the chamber to fill with smoke.

When youre doming a chick who is so bad until she suddenly releases liquids from every whole in her body(nostril, ear, mouth, butthole, vag).

While a girl is sitting on a toilet urinating, another person comes up and urinates on her stomach and or chest. The multiple streams falling into a common pool make a refreshing sound similar to that of a waterfall.

When you are having sex and just before jizzing whip it out of the hairy dog and cum in a straight horizontal line accross the area between the mouth and nose, she opens her mouth wide and sticks her tongue out. As the jizz slowly slides down into her mouth and then she swallows.

A civilized way of saying WTF

WaTerFall