a temporary condition experienced when you wait too long to take a poop and the urge seems to magically disappear. i.e. the turd retreats up into the depths of your colon
Dude on Bus: Oh man! Pull over, I have to drop a doozer!
Bus Driver: Go fuck your mother!
Dude on Bus: (sad) ok
(20 minutes later)
Dude on Bus: Woah! Where did it go? My poo has disappeared!
Lady next to dude on bus: Don't worry sugar, It sounds like you just had some colonial retreat, it'll be back
Bus Driver:(condescendingly) Oh it will be back, oh yes...it will be back...