Fruitcake
Part of speech: noun
Definition: A cake containing dried fruits and, optionally, nuts, citrus peel and spice. A crazy or eccentric person. A male homosexual.
Screwball
Part of speech: adjective
Definition: Crazy, offbeat, bizarre, zany, or weird.
Part of speech: noun
Definition: A pitch thrown with added pressure by the index finger and a twisting wrist motion resulting in a motion to the right when thrown by a right-handed pitcher.One who behaves in a crazy or screwball manner.