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Adjective: whacky (whackier,whackiest)  wa-kee
  1. Ludicrous, foolish
    "gave me a whacky reason for not going";
    - cockamamie [N. Amer], cockamamy [N. Amer], goofy, sappy, silly, wacky, zany
  2. Informal or slang term meaning insane, strange, eccentric or stupid
    "it used to drive my husband whacky";
    - balmy [archaic], barmy, bats, batty, bonkers, buggy [N. Amer], cracked, crackers, daft, dotty, fruity, haywire, kooky, kookie, loco, loony, loopy, nuts, nutty, round the bend, around the bend, wacky, daffy, dippy, potty [Brit], nutsy [N. Amer], wacko, round the twist [Brit], daft as a brush [Brit], cuckoo

Derived forms: whackiest, whackier

See also: daft, dumb, foolish, insane, stupid

Encyclopedia: Whacky