This is the unyielding fear (or dread) of getting back on the toilet after getting hit with a Surface to Air Missile. This sometimes causes serious medical problems, or pooping of the pants, if it is not conquered in time. Sometimes the Psychological damage can be permanent. This is highly common on the Western Hemisphere.
Joe-"Just go, the bathroom is right there."
Jacob-"I'm afraid; last time I got hit with a Surface to Air Missile"
Joe-"Oh no! You have Ninja Phobia!"