Top definition
Waterfalls on the border of the USA and Canada
by pro-nun-see-A-shun January 01, 2003
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2
The testicles.Originates from cockney rhyming slang.NIAGRA FALLS =BALLS.
"The cunt came at me so I kicked him in the NIAGRAS."
by Mugwump November 11, 2004
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3
Slang for Viagra, Cialis or any other Erectile Dysfunction Meds. It is a combination of the word Viagra, Which is the most well know ED pill, and Niagara as in the popular water falls, because of the copious amounts of Jizz one produces while taking the Viagra.
-I took a couple of "Niagras" last night before banging the old lady, shot so much spooge I thought I'd need an I.V. afterwards.

-Don't take any of those "Niagras" tonight, my snatch is still sore from last Tuesday!
by fatcat February 05, 2007
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The vengeful act of crapping on a lover's chest while they sleep.

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4
A stupid name for a bunch of waterfalls.
Let's take some Niagra!
by B-Drac September 13, 2003
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The vengeful act of crapping on a lover's chest while they sleep.

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5
Niagra = Giant Six Flags with deadly rocks at the bottom. Don't look down :| .
by Anonymous July 27, 2003
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