screwball

screw·ball

screwball

n.
  1. An eccentric or crazy person; an oddball.
  2. A baseball pitch that curves in the direction opposite to that of a curve ball. (Baseball)

screwball

adj.
  1. Eccentric; zany; crazy; as, screwball antics; a screwball comedy.
  2. Ridiculously unsound; improbable or doomed to failure; -- of plans or ideas; as, a screwball plan to raise cocoanuts in Alaska.