Graggywumpus

Crazy or unusual, commonly used in a negative way.
Bad.
A person who is grag. (spelled Grag E. Wumpus.)
A poison control company. Grag E. Wumpus Poison Control.

See grag.
Variation of cattywumpus.

That's major graggywumpus.
Graggywumpus, Batman!
Well Grag E. Wumpus.