Pronunciation (UK) IPA (key): /ˈwɪədəʊ/ (US) IPA (key): /ˈwɪərdoʊ/ Audio (US)(file) Noun Singular weirdo Plural weirdos or weirdoes (slang) (countable) A weirdo is a person who does strange or odd things. Related words weird Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads