reverse flush 

The result of making a large, forceful, and explosive deposit into a toilet, causing the water in the bowl to splash back on your ass.

That king-sized chimichanga from The Alamo had me doing the reverse flush the minute I got home.

reverse flush by mrs_equator September 23, 2006

Reverse Courtesy Flush 

When you find someone else's shit in the toilet and you have to flush before you use it

I got into the stall at the restaurant and had to do a reverse courtesy flush for the guy before me before I could drop my own deuce.

Reverse Courtesy Flush by LeafyGreens37 December 14, 2022

Reverse Flash 

Someone who likes to use a vibrating hand to explode people's heart. They also have been trying there whole life, "chasing" after someone, so obsessed with this someone trying to be this someone. Also they have a tendency to kill mothers in front of there little boy and ruin his entire life.

"Hey is that the Reverse Flash, I think he just killed my mother".

Reverse Flash by GBClassikEd89 July 18, 2019

The Reverse Flash 

This is a sex position where the Man (or women if it’s a lesbian thing) Takes a taser to the Women’s clitoris to make her cum instantly.

Berry made her cum instantly with “The Reverse Flash”

The Reverse Flash by Blakeorsum April 16, 2021

Reverse-Flash 

The incredibly evil man who jerked off The Flash so fast it made him seem like he nutted at the simple touch of a woman.

“It was me Barry, I jerked you off at super speed to make it seem like you nutted at just a woman’s touch!!”
-Reverse-Flash to The Flash

Reverse-Flash by ButtholeEnthusiast May 1, 2022

Pull a Reverse Flash 

Running back in time to kill your Victim's Mother, causing a hit television series

Cisco-"Barry it's time to Pull a Reverse Flash!"
Barry then runs back in time to kill Solovar's Mother and accidentally kills Harambe.

Pull a Reverse Flash by Doctor 8bit March 20, 2017

Reverse Flash 

A Reverse Flash is when you're pushing out a fat shit turd but midway your butthole clenches and it make the turd go in reverse.

Dale: "So yesterday i was so constipated that I had a reverse flash."

Ted: "Did it feel like getting anal?"

Dale: "Fuck you Ted."

Reverse Flash by BrownBearr November 17, 2017