Surprise poo 

Common mostly with females, a surprise poo occurs when you go to the toilet to have a piss but end up following through- fortunately on the toilet- as you were unaware of your bowel evacuating needs.

Uncommon with males as they pee standing up.

girl 1: I've been waiting 10 minutes for you, where've you been??
girl 2: I had a surprise poo, sorry
girl 1: Oh, okay

Eavesdropping dude: wtf

Surprise poo by bricksatmyface December 17, 2012

Poo Surprise

When you go to the bathroom to pee but all of a sudden you need to poop. This is a ‘poo surprise’.

Person A - Hey man I just gotta go pee.
20mins later...
Person B - Haha you had a poo surprise didn’t you!?

Poo Surprise by Supersparkleunicorn December 17, 2018

Surprise Poop

You are in the bathroom to pee, and suddenly, and out of nowhere, like a phantom.. you have to poop. There was no previous sensation as if one had to defecate, it snuck in like flynn and out like a trout.

Last night at my families house, I was taking a nice long piss when suddenly I had a surprise poop

Surprise Poop by michelleywords December 7, 2011

Suprise Poo 

Suprise Poo. When all of a sudden you need to take a poo without realising it. This may happen after eating, when trying to fart or any other time.

OHHH man I tried to fart and did a suprise poo. This McDonalds chips may give me a suprise poo, therefore i won't eat them.

Suprise Poo by jizzhead April 11, 2009

surprise poop

when you go to the bathroom thinking you have to pee, when suddenly, out of the blue, you have to poop.

"dude, I just had a wicked surprise poop"

"surprise poops piss me the fuck off"

surprise poop by Zombri507 April 24, 2014

The Surprise Poopie 

Your're not even at the toilet because you are sure you are about to fart, but *oops* --- a poopie!!!

God dammit! I just soiled myself! Damn those "Surprise Poopies!!"

The Surprise Poopie by john March 4, 2004

surprise poopy  

to accidentally poop yourself

Bubba had surprise poopy at work, "what a scharter", that was an accident.

surprise poopy by Stinkeeeee September 28, 2008