When you have uncontrolable diarrhea and a massive shit log comes in strong off the port bow and fires out of the cannon at uncontrolable speeds followed by another 10 second blast of diarrhea causing a hiroshima sized splash back
"Jerry barely made it to the bathroom before he released the German Waterslide."
by TheCasualToaster March 31, 2016
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when thirty or more enimas are given at one time and the doodoos are collected on a sheet of linoleum and all thirty participants slide down it naked
dude, lets get a bunch of people together and have a brazillian waterslide
by bassplayer2493 November 7, 2009
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When like ur jus' chillin' on da max and some random guy is jus' like starin a hole through ur head and has a dazed look on his face and the jus' let's it shoot if u get my drift.
by Mandi rikitu May 7, 2003
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When you are having sex and the penis slips out of the vagina while on the "backstroke" and you thrust forward and the penis forcefully enters the anus.
I heard that carl accidently gave lacy a chattanooga waterslide. Wow carl is such a tease!
by theunderwaterhamburgler September 6, 2022
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The act of butt chugging from another person's rectum.

Person "A" first performs a classic butt chug. Next, while maintaining hold of the alcohol of choice inside their rectum and hose still attached, the other end of the hose is inserted into the rectum of person "B". Then person "A" expels the alcohol through the hose and into the rectum of person "B" thus completing the Devil's Waterslide.
Daniel and Tommy say their gonna do a Devil's Waterslide at the party tonight.
by Morose Monkey June 7, 2022
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Ejaculating in a woman with her ass and the air and sliding the cum down between her cheeks with your dick.
I gave her a Montreal waterslide while she was leaning over the chair.
by Wikud June 1, 2021
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The act of filling a waterslide with piss and cum and diving head first into it. It is fully enjoyed when you do it with multiple people and have sex in it afterwards.
"Did you hear about Jame's Washington Waterslide at his house last Friday? everyone contributed to fill it up!"
"Wow talk about a group effort!"
"I wish I went but I was too busy enjoying my girlfriend's Mississippi Birdbath."
by pimpster69420 September 17, 2023
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