When your partner is sitting on the toilet and you sit on their lap facing them. Then you urinate into their belly button while shitting through their legs, and the pee drips down into the toilet like a waterfall.
by Sketcherino November 5, 2021

The sexual of one man performing oral sex on another man while listening to the song Thunderstruck by ACDC. The man receiving the blow job yhen ejaculates on the other mans chin. This creates a waterfall effect.
Chuck and Mike love giving each other blow jobs. Their favorite activity is when they take part in a thunderstruck waterfall.
by Sneakerman June 2, 2018

by Dave, General Manager of Ross October 28, 2020

When the women puts herself in the piledriver position, and legs wide. The man then inserts a uncorked bottle of champagne into her pussy, then shakes it up. The champagne flows out of her pussy and then down her body and into her mouth. She drinks her piledriver champagne waterfall.
While in the piledriver position, champagne is poured into her pussy then down into her mouth. Piledriver champagne waterfall.
by whtronin October 5, 2022

It's when you are in a creampie gangbang and all the guys ejaculate inside girl and it's running out from her
by Mr Pickles666 January 11, 2022

Girl: oh my! I'm going to cum!
Boy: U aren't gunna make me waterfall again are you?
Girl: u bet I am
Boy: U aren't gunna make me waterfall again are you?
Girl: u bet I am
by baylee_tiny September 4, 2016

by revlis420 June 2, 2017
