Open the gates 

When a women open her legs. Opening the gates means to spread a woman's legs open for sex

"I totally opened Ahri's gates last night!"
Damn I'm going to try to open the gates on Sarah today!"

Open the gates by SwagMoney69 September 8, 2015

Open the Flood Gates

When two men who desperately need to urinate press the heads of their penis's together so that the tips touch each other and let the golden stream flow into the other's shaft-hole.

A variation of this is when neither party involved has been circumcised, and both foreskins are stretched out to be pressed together. This may be referred to as "Bursting The Flood Gates"

Chris: "Hey man, you bustin'?"
Heath: "Totally!"
Chris: "Wanna go Open the Flood Gates?"

Bruce: "Hey Abraham, wanna go Burst the Flood Gates with me?"
Abraham (shakes head): "Sorry Bruce, I'm Jewsish."

Open the Flood Gates by Nerezza January 21, 2009

The Fudge Gates Are Open 

Used to signal to others that digestive tract is ready to defecate. Similar to the term “The Flood Gates Are Open” when describing a female’s monthlies.

Ginni: Hey, you’re off in a hurry, where are you going?
Nick: I gotta get to the wiz palace fast, The Fudge Gates Are Open wide and it’s gonna be a big one.

The Fudge Gates Are Open by Gabrielle Buesch October 14, 2022