poo valve 

the hole; including flap, rim and tunnel, through which mammals launch poo and related solid and gaseous matter.

an exit not an entrance

an area that should always be kept sparkling clean to avoid pri (painful rectal itch)

the area where scented (mountain breeze, potpourri etc) suppositories are inserted prior to a date in order to use farts to set a romantic mood

Dude 1: dude wats up? u look like crap.
Sick dude: yeah dude me frickin poo valve was hanging open all night.
Dude 1: nice

poo valve by drpoonandtheteenangels August 7, 2009

Exxon Valdez poo 

When it seems like you've wiped your ass a hundred times and the toilet paper is still covered in poo. Reference to the huge oil spill in Alaska from the ship Exxon Valdez.

I'm taking an Exxon Valdez poo. I just keep wiping and wiping, and it just keeps coming and coming. Oh well, I guess I'll just sit here and let it dry.

Exxon Valdez poo by Robert VonAwesome October 10, 2009