wackoEnglishOxford Dictionary of Englishwacko /ˈwakəʊ / (also whacko) informal mainly North American English ▸ adjective very foolish, irrational, or eccentric: his wacko conspiracy theories. ▸ noun (plural wackos or plural wackoes) a person who is very foolish, irrational, or eccentric: a trailer park peopled by exotic wackos and misfits. – ORIGIN 1970s: from wacky + -o.
EnglishOxford Dictionary of EnglishEnglishOxford Dictionary of English
