A cute coloquialism for diarrhea, making reference the the "chocolate waterfall" featured in the film "Willie Wonka and the Chocolate Factory"
by Cyc4015 November 24, 2017

When you haven't wacked off for a month and the cum has built up pressure, causing it to explode and drip off your hand.
by YippyKaiYo69 May 8, 2021

A variation on the classic upper decker, combined gracefully with the dry dock.
Step 1: Turn off the water for the toilet at the valve.
Step 2: Perform one last flush, draining the remaining tank water.
Step 3: Perform an upper decker, but do not turn the water on. A loose stool is recommended here, with inspiration being drawn from the name.
Step 4: Leave the toilet, water off and bowl emptied, with the chili base in the tank.
Ideally, the smell will draw attention. The unfortunate victim them turns the water back on, thus "making the chili." Next, a flush...and aged (or "simmered") brown streams of Texas brown flow into the bowl. A true masterpiece, intended only for the very brave!
Step 1: Turn off the water for the toilet at the valve.
Step 2: Perform one last flush, draining the remaining tank water.
Step 3: Perform an upper decker, but do not turn the water on. A loose stool is recommended here, with inspiration being drawn from the name.
Step 4: Leave the toilet, water off and bowl emptied, with the chili base in the tank.
Ideally, the smell will draw attention. The unfortunate victim them turns the water back on, thus "making the chili." Next, a flush...and aged (or "simmered") brown streams of Texas brown flow into the bowl. A true masterpiece, intended only for the very brave!
"I'm playing a long game. My in-law's bathroom has a chili waterfall simmering--can't wait until they find it!"
by Jack Trager August 13, 2023

An innuendo regarding getting a woman wet.
Southern refers to how the vagina is down below (as South is down). Waterfall refers to how wet she gets.
Southern refers to how the vagina is down below (as South is down). Waterfall refers to how wet she gets.
by AgreeableRecord August 6, 2024

by Boganville222 October 4, 2018

More into detail what nerf gun waterfalls is: You know how water squirts out of water guns? Well now the hole were the water squirts out is your butthole except now shooting out powerful diarrhea.
“ dude fuck, I just had some nerf gun
waterfalls in my grandmas toilet! It’s so messy and smelly AF! Bro my grandma is gonna die like twenty years earlier because of this smelly ass!”
“ dude fuck, I just had some nerf gun
waterfalls in my grandmas toilet! It’s so messy and smelly AF! Bro my grandma is gonna die like twenty years earlier because of this smelly ass!”
by Hey bob yo yo boy March 18, 2019

A really weird sex position where the male, or penetrator, is laying off the edge of the bed so that his penis and torso are still on the bed but shoulders on the ground. The female, or penetrati, inserts the penis into their preference of orifice. The female holds the male with her legs and has full control over how deep of a penetration she would like. The wobbly part is just the dumbass penetrator wobbling on the ground like an asshole.
Guy 1: Yeah I tried doing that waterfall sex move on her but I was so unstable
Guy 2: lol you hit her with the wobbly waterfall
Guy 2: lol you hit her with the wobbly waterfall
by The Psycho King July 19, 2017
