The floodgate turd is a piece of poop which holds back a torrential flow of diarrhea that has built up in a persons colon. Visually similar to rushing water flowing through a dams floodgates.
Yesterday, I passed a Floodgate Turd and had an endless river of shit pour out of my asshole.
Having sex with a woman that squirts in a way that when you pull out, all of the fluid shoots out of her vagina at once.
"I was pounding away my girlfriend with her bent over her bed, right? Well she's a squirter, so when I pulled out it looked and sounded like someone fucking threw a bucket of water onto the floor between her legs. I've been calling her floodgate ever since."