An eccentric, ditsy, arcane, funny, person. Is generally a goodnatured and sympathetic person. Not to be confused with a "wackjob," who can be nasty,or violent.
Aunt Rosemary's fondness for multiple cats, Minnie Pearl hats, and alien abductions was never a source of shame for Fred, but rather a source of pride. He thought it surely must qualify her for the mythical "Wackadoodle Hall of Fame."
(n.) A person who instantly catches your attention, who is dressed in outlandish clothing, or acting out in an awkward way,or just plain freakish.
Basically a cross between a wacko and a noodle?...
A person who walks around in a banana costume may be considered a wakadoodle.
(adj.) Anythingbeyond whacky. Usually a one word exclamation of shock in response to the observed whackiness.
(n.) A person displaying whacky behavior.