screwball

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.

The screwball is not thrown much because it tends to damage pitcher's arms.

One who behaves in a crazy manner.

I will not listen to this screwball any longer.

A screwball comedy.

Crazy, offbeat, bizarre, zany, or weird.

Also a big hand for Silver Linings Playbook, an exuberant modern screwball comedy we had, in an unseemly fit of cynicism, deemed "too entertaining" for Academy voters.