pookachabra

An unknown and mysterious entity, most likely evil, you can hear rustling around in the bushes nearby.

Derived from the slang term *Pook, which is commonly used to describe transient individuals residing in the small forests/brush within urban residential areas.

*Canadian West Coast origin

Shhhh!!
Did you guys hear that?
I think I just heard a Pookachabra over there behind those trees!