to discretely exita social situation, leaving the remaining participants confused as to your wherebouts.
man, where the hell is dave? he must have pulled a side door.
yeah man, the guy's girlfriend was stressing me out so i side doored.
By Ninon
The Side Door
(noun) Taking a poo on one side of the toilet seat, facing the wall. On a 90 degree angle from the regular pooping position (RPP). Usually in desperation, due to skid marks or pubes on either side of the toilet seat.
A close friend who feels comfortable coming into your house via the side door, probably off the kitchen. You, too, are comfortable with this friend entering your house through the side door. A side-door friend is probably one of your best friends. Conversely, front-door friends are those acquaintances you are not all that close/comfortable with.