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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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.
We smoked a waterfall yesterday, it gives you fucking huge rips.
by diseased sheep July 10, 2006
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An improvised smoking device mainly used for smoking hash resin through. This is traditionaly made from a 2-5tr plastic bottle with a 5mm hole melted into the side about 10cm from the base. With one finger covering the hole the bottle is filled with water. A head (13mm socket set + gause with a thin band of "Sticky Tack" wrapped around the outside to produce an airtight fit) is then filled with smoking material and placed into the top of the bottle. Then the user removed their finger from the hole letting the water flow out from the side of the bottle while holding a naked flame (lighter/match) above the head. The drop in air pressure inside the bottle caused by the water draining out pulls the flame into the head which in turn ignites the smoking material filling the inside of the bottle with thick 'cream cheese' type smoke which (after removing the head from the neck of the bottle) the user then sucks/inhales the smoke in one deep breath (unless they are a lightweight) XD.
Most smoking noobs fail to grasp how a waterfall should be used correctly so their knowledge on the subject ends here.
Because the hole is made in the side of the bottle not the bottom there is a certain amount of water that remains in the bottle this is not a design flaw. The idea is then to remove the head then place a finger over the hole in the side of the bottle and a thumb of the other hand over the top of the bottle. Then violently shake the bottle for a second or two. Because THC is not soluable in water only the impurities in the smoke will get absorbed into the water (nicoteen etc). Not only is the smoke cleaner but it is also much cooler so the user is less likley to have a coughing fit when trying to inhale the THC vapour.With a lot of the impurities removed the user recieves a much higher absorbtion of THC into their bloodstream than if they were to use the same amount in a normal pipe.
"hey i got some hash.."
"cool lets make a bong dude"
"..Nice idea but i havent got anything to use as a down pipe"
"fuck it what about a bucket?"
"..nah they just choke me out.Its to much for me"
"hmmm....hey what about a waterfall?"
"woo hoo!... now your talking"
by Snow-e May 4, 2007
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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 17, 2012
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when 3 or more girls drip cum from one mouth to the other until it is all swallowed or gone.
yo, dam those bitches totally waterfalled my man juice.

I glazed that bitch while she waterfalled kevs cum.
by Justin P nigga April 18, 2008
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A waterfall is when a little bit of smoke is still in your mouth and is forced out and is then inhaled through the nose and it looks like a little updide down waterfall. It's not really going to get you more high, but its a cool little smoke trick. Don't fuck up or you'll just end up with a smaller hit.
Damn....i fucked up on that waterfall and just lost all that smoke.
by iSmoke August 7, 2007
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when u are drinking a beverage and someone wants some they ask for a waterfall ( mostly used by teens in Mississauga)
Joe: yo b lemme have a waterfall?
Bob: arite
Joe: SEEEN!!
by Za December 15, 2005
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