Definition of wackadoo in English:


Syllabification: wack·a·doo
Pronunciation: /ˈwakəˌdo͞o
(also whackadoo)
US informal


  • An eccentric or fanatical person: he seems like a good guy even if he is a wackadoo
    More example sentences
    • I've just happened to come across quite a few wackadoos in my time.
    • His fanbase shifted from horny teens and MTV devotees to hardcore wackadoos.
    • Will we see fewer interviews with wackadoos in the street and just general mayhem?


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  • Eccentric or fanatical: out of the blue, he would do something completely wackadoo
    More example sentences
    • It takes a little time to get over the wackadoo premise and for the show to really warm up.
    • The five minutes Lloyd spends reprising his wackadoo role as the piranha-infatuated biologist are entertaining enough.
    • The wackadoo radio host and conspiracy-monger is posting about this on Facebook and Twitter.


1950s: probably from wack2 or wacky.

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Pronunciation: ˌkɒlərəˈtjʊərə
elaborate ornamentation of a vocal melody