Definitions of screwball
  1. noun
    a pitch with reverse spin that curves toward the side of the plate from which it was thrown
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    type of:
    delivery, pitch
    (baseball) the act of throwing a baseball by a pitcher to a batter
  2. noun
    a whimsically eccentric person
    synonyms: crackpot, crank, fruitcake, nut, nut case
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    type of:
    eccentric, eccentric person, flake, geek, oddball
    a person with an unusual or odd personality
  3. adjective
    foolish; totally unsound
    “a screwball proposal without a prayer of working”
    synonyms: crazy, half-baked, softheaded
    not practical; not workable or not given to practical matters
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