(noun) A (generally homo)sexual act in which one person penetrates their partner's anus as that person defecates, causing a power struggle between the two solids. Can be either intentional or unintentional. Takes its name from Madison, WI, the sjw capitol of the world.
Mark: Dude, last night I was super horny, so naturally I called up my fuckbuddy. He said he was down, but hadn't "gone" in a while. Long story short, I was too horny to care and ended up with a Madison Mudslide. That's like the third time this month!
Gabe: "He" is a trans-phobic micro-aggression. Please use the non-gender specific "they."
Gabe: "He" is a trans-phobic micro-aggression. Please use the non-gender specific "they."
by Hamster's Hardon July 6, 2016

Ejaculating into your partner's anus after anal intercourse. Then said partner runs to the bathroom to let the hazelNUT mudslide flow into the porcelain throne.
Hey babe want to get wet and wild tonight since the kids are away?
Babe: Sure, but what new position do you want to try out this time?
Guy: I've actually always wanted to give you a hazelnut mudslide.
Babe: Sure, but what new position do you want to try out this time?
Guy: I've actually always wanted to give you a hazelnut mudslide.
by Wetterandwilder May 10, 2023

Man that food last night gave me the Aztec mudslides
Please not there again! It gave me the aztec mudslides last time!
Please not there again! It gave me the aztec mudslides last time!
by Krisalmighty March 24, 2021

When someone takes a shit in the toilet so big is leaves a smear across the whole bowl resembling mud sliding down the sides.
by Joel junior March 26, 2021

by banana mudslide March 1, 2018

by MudDoMaGee June 1, 2021

by My Mama said May 11, 2020
