whacko

/ˈwækoʊ/
IPA guide

Other forms: whackos

Definitions of whacko
  1. noun
    a person who is regarded as eccentric or mad
    synonyms: nutter, wacko
    see moresee less
    type of:
    eccentric, eccentric person, flake, geek, oddball
    a person with an unusual or odd personality
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