1. Foolish; totally unsound
   "That's a screwball idea";
   - crazy [informal], half-baked [informal], softheaded, crackpot [informal], moronic [informal], nutty [informal], wiggy [US, informal]

1. [informal] A whimsically eccentric person
   "The neighbourhood screwball was known for his outlandish conspiracy theories";
   - crackpot [informal], crank, nut [informal], nutcase [informal], fruitcake [informal]
    
2. A pitch with reverse spin that curves toward the side of the plate from which it was thrown
   "The batter swung and missed the deceptive screwball"

Derived forms: screwballs

See also: absurd, cockeyed [informal], derisible, derisory, idiotic, impractical, laughable, ludicrous, nonsensical, preposterous, ridic [informal], ridiculous

Type of: dag [Austral, NZ, informal], delivery, eccentric, flake [N. Amer, informal], geek [informal], oddball [informal], pitch

Encyclopedia: Screwball