Top Definition
After a male ejaculation, and your pee comes out in two different streams, you must make the ultimate decision: which stream will go in the toilet?

The worst is when the most powerful stream changes to the least powerful and you are suddenly powerwashing your wall with piss.
I had a Niagra Fails today at the toilet, the worst part was it's my grandma's.

Niagra Fails just flooded your bathroom.
by StickyFingersINyourMOM August 11, 2011

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×