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  1. Dictionary
    wacko
    /ˈwakəʊ/

    adjective

    • 1. mad; insane: "his wacko conspiracy theories"

    noun

    • 1. a crazy person: "a trailer park peopled by exotic wackos and misfits"

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  2. dictionary.cambridge.org › dictionary › englishWACKO | English meaning - Cambridge Dictionary

    WACKO definition: 1. a person whose behaviour is strange and different from that of most people 2. a person whose…. Learn more.

  3. www.merriam-webster.com › dictionary › wackoWacko Definition & Meaning - Merriam-Webster

    Wacko is an informal word that means wacky or crazy. It can be used as an adjective or a noun. See synonyms, examples, word history and related entries.

  4. www.vocabulary.com › dictionary › wackoWacko - Definition, Meaning & Synonyms | Vocabulary.com

    Describing someone as a wacko is a derogatory way to say they're quirky or eccentric. It may be tempting to call the neighbor who walks his pet peacock on a leash a wacko, but it wouldn't be very nice.

  5. www.dictionary.com › browse › wackoWACKO Definition & Meaning | Dictionary.com

    Wacko definition: an eccentric, strange, or odd person.. See examples of WACKO used in a sentence.

  6. dictionary.cambridge.org › us › dictionaryWACKO | definition in the Cambridge English Dictionary

    WACKO meaning: 1. a person whose behaviour is strange and different from that of most people 2. a person whose…. Learn more.

  7. www.thefreedictionary.com › wackoWacko - definition of wacko by The Free Dictionary

    Define wacko. wacko synonyms, wacko pronunciation, wacko translation, English dictionary definition of wacko. also whack·o Slang n. pl. wack·os A person regarded as eccentric or irrational: "a catchy pop portrait of a wacko who talks to himself in French" .

  8. www.collinsdictionary.com › dictionary › englishWACKO definition and meaning | Collins English Dictionary

    Wacko is an informal and disapproving word for someone who is strange and eccentric, or who has a mental illness. It is a back formation from wacky, and can be used as an adjective or a noun.