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Wiktionary
wackiest

a. (en-superlativewacky)

WordNet
wacky
  1. adj. pungent adjectives of disesteem; "gave me a cockamamie reason for not going"; "wore a goofy hat"; "a silly idea"; "some wacky plan for selling more books" [syn: cockamamie, cockamamy, goofy, sappy, silly, whacky, zany, unreasonable]

  2. informal or slang terms for mentally irregular; "it used to drive my husband balmy" [syn: balmy, barmy, bats, batty, bonkers, buggy, cracked, crackers, daft, dotty, fruity, haywire, kooky, kookie, loco, loony, loopy, nuts, nutty, round the bend, around the bend, whacky]

  3. [also: wackiest, wackier]

wackiest

See wacky

Usage examples of "wackiest".

But, wackiest of all, he invited the boys round regularly for musicales.