McPooterDrip is when you have anal seepage. It is when you are just sitting or standing around and then some poop juice leaks out and stains your pants. McPooterDrip can also be the excretion of any form of poop in a persons pants.
That guy right there in the khaki's just McPooterDripped and you can see it all over his pants.
by Chinese Phil May 07, 2011