to drink from somebody else's soda or pop by holding the can high, over your mouth and slanting it so that the drink falls right into your mouth without having you touch the can with your mouth; which would be unhygenic
I was so thristy and Mike had a soda. I asked him if I could get a waterfall
by Brizzy Izzy August 07, 2011

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A domain, kingdom, plot of land, hood, territory, or any other area where one dwells and calls home.
I told that motherfucker Tyrone to never come around my waterfall again, now he dead!
by R. Rutherford November 11, 2010

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1. a perpendicular or very steep descent of the water of a stream.

2. something resembling a waterfall.

3. a perpendicular or somewhat steep descent of bottom of a swimming pool, or another bowl made for skateboarding. used mostly for allowing experienced skateboarders to develop more speed and flow while riding said pools and/or bowls.

4. the type of skateboard terrain that is gayrab's biggest fear. one of many fears of the Southern California manatee.
"It's very interesting to note that E. Groff is still harboring ill feelings towards people whom of which favor skating waterfalls. He needs to grow up, learn how to skate, and quit his everday drivel and whining."
by name witheld June 17, 2004

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When a female sees a guy they think is very attractive, their vaginas get so wet it drips down intensely like a waterfall.
"Omg, its Joe he so fucking sexy!" Meanwhile in the vaginal area *WATERFALLSSSSS*
by JoeFatha September 12, 2012

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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.
Kanye: Do you know what I did last night with Kim;) ?

Micheal: what!
Kanye: I surprised her with a waterfall! And she was there for ten minutes before the flow finally finished!
by T' up north March 19, 2015

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to make a girl cum...made famous by Ludadris...
I gave my girl the ill Splash Waterfalls.
by 4 June 14, 2004

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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.
Dude, let me waterfall some of your Dr. Pepper.
by IggyMidomi May 12, 2014

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A civilized way of saying WTF

WaTerFall
You: I just chugged a six pack of coke.

Me: Waterfall?
by youshoe October 16, 2012

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