Someone who defies normality when using the bathroom (usually at a college dorm or a frat) by pooping in the wrong places, usually near the toilet.
Preferred places for a Fecal crusader:
Floor on Side of Toilet
Toilet Paper Dispenser
Floor Behind Toilet
Also, someone that we want to beat up SO MUCH, but always disappears before we discover his fecal carnage.
Java: Hey man, why's the door locked?
Printz: The Fecal Crusader struck again!
Dondo: Yeah, he was s----ing off the side of the f---in' toilet.
Java: Did you see anyone run?
Java: Wow, he goes in and out so fast he probably doesn't even wipe! If you caught the Fecal Crusader, what would you do with him?
Printz: I'd invite him to sleep with me just so I'd kill him.