the raging waterfall 

when a male is going at it in his female partners vagina and he does not want to stop but has to urinate he just pisses in her vagina

Hey dude did matt tell you about the raging waterfall he pulled on that trick.

the raging waterfall by jcda May 14, 2008

Copper Waterfall

Eating a girl out when she's on her period

Dude, that was some a juicy copper waterfall I did last night.

Copper Waterfall by Av3 November 14, 2007

Sanfrancisco Waterfall 

The act of urinating in female's Anus. This is a term that can be commonly used to replace the saying, "I'd pee in her butt", if a female is, in fact, attractive.

I would give that girl a SanFrancisco Waterfall.

Sanfrancisco Waterfall by magicmanHAWKEYE December 16, 2011

Russian Waterfall 

A Russian Waterfall is the situation when you gotta pee and your girl is peeing you just pee between her legs as she is sitting and peeing as well

Sally would't hurry up in the damn bathroom so i gave her the Russian Waterfall treatment

Russian Waterfall by Tamey January 10, 2012

chunky waterfall 

Noun - The act of getting a blowjob and the girl/guy throws up on your dick.

Verb - To give someone a chunky waterfall (see above)

"Hey Trent, I'm so hungover right now. Don't make me blow you or I might give you a chunky waterfall."

chunky waterfall by schoolglue1234 September 6, 2014

Urban Waterfall

A constant flow of rainwater caused by overflowing spouting and/or guttering.

most commonly seen in schools and blocked gutters.

-"What a skody school"
-"I know their such a beautiful freak of nature"
-"what are?"
-"urban waterfalls"

Urban Waterfall by SAMTHEMAN177 June 16, 2010

Upward Waterfall 

The act of eating her out while she is upside down until she squirts.

Bob and Cindy upward waterfall last night.

Upward Waterfall by SKM3 November 30, 2010