A poop of such evil magnitude that it is feared by local natives, much like the El Chupacabra itself.
I just unleashed El Poopacabra. Might want to stay out of there unless you have fire.
by moooooog35 February 07, 2011
A poop so unreal in size or characteristics that no one believes it actually existed.
Me: My poop was so big it circled the toilet twice. Friend: Sounds like an el poopacabra.
by themich July 26, 2014