Gimedaya (gih-me-day-uh) means; mass or intense confusion. Gimedaya can be used to confuse people just by saying it.
e.g 1;
person 1:"dude, you're really gimedaya."
person 2:"gimedaya??"
person 1:"gimedaya."
e.g 2;
person 1:"hey, you're gimedaya."
person 2:"huh???"