This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. Baseball A pitched ball that curves in the direction opposite to that of a normal curve ball.

n. Slang An eccentric, impulsively whimsical, or irrational person.

adj. Slang Impulsively whimsical; eccentric: That screwball proposal won't work.

n. 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.

n. One who behaves in a crazy manner.

adj. Crazy, offbeat, bizarre, zany, or weird.

n. a whimsically eccentric person

adj. foolish; totally unsound

n. a pitch with reverse spin that curves toward the side of the plate from which it was thrown

"Quote: We had some pitchers that threw what we called a screwball in those days, but that was a hard pitch to throw, and it was hard on your arm."

impractical   

geek    eccentric    eccentric person    flake    oddball    delivery    pitch   

screwball comedy   

female-driven    kooks    child-abusing    pseudo-classic    five-act    slow-burning    postglacial    metaverse    dimwit    Cardiff