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

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

Floodgates 

Extremely short jeans, usually worn by a "Gain" or someone who is just a fucking nerd. They are so high that you can see their ankels and their socks.

Damn, look at that kid. He's got massive floodgates!

Floodgates by Paskwal and Gain December 29, 2008

Floodgates have opened 

When needing to pee or poo but can’t hold it in any longer

Oh no the floodgates have opened

Floodgates have opened by Chuckler chuckled September 5, 2023

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

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

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