Bloodgates 

When a male becomes sexually aroused and blood flows to his genitals, making him hard.

Man when she walked by me in them jeans, the bloodgates opened up.

Bloodgates by I am the Absolute Unit November 30, 2019

Floodgates 

when a man is masturbating and all of a sudden lots of cum just spurts out.

mate: " oh mate yesterday when I was masturbating the floodgates just opened, there was cum everywhere!"

you: " okay......"

Floodgates by urbanDICtionary November 28, 2012

The floodgates of my anus 

When something involuntarily enters or exits your anus.
When the sphincter muscles of your anus are no longer under your control.

I'm just warning you that when I fall asleep the floodgates of my anus will open and I have no control of it.

The floodgates of my anus by sphincter muscle July 4, 2016

floodgates 

Synonymous with the act of hooking up; used as a noun. In accordance with this, "Opening the floodgates" also refers to the act of hooking up.

Guy: "Hey, it's been a while! How do you feel about re-opening the floodgates??"
Girl: "Yeah, I'd love to. It's been so long since we closed them."

floodgates by grettathegiraffe August 26, 2017

open the floodgates

The point at which you first piss after you have been drinking your favorite alcoholic beverage and at this point you will be pissing every ten minutes. See 'break the seal.'

I can't hold it anymore, I have to go open the floodgates.

open the floodgates by Jack Lanton July 31, 2006

bloodrats 

the most hottest person alive ‼️

bloodrats is so hot you guys

bloodrats by helloperson June 11, 2021

The floodgates of my anus 

When something involuntarily enters or exits your anus.
When the sphincter muscles of your anus are no longer under your control.

I'm just warning you that when I fall asleep the floodgates of my anus will open and I have no control of it.

The floodgates of my anus by sphincter muscle July 4, 2016