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know-it-all [know-it-alls]▼(someone who obnoxiously claims to be knowledgeable on a subject)noun[UK: nəʊ ɪt ɔːl] [US: ˈnoʊ ˈɪt ɔːl]
wise guy▼(one who is insolent or flippant)noun[UK: ˈwaɪz.ɡaɪ] [US: ˈwaɪz.ɡaɪ]
flippant▼(lacking respect)adjective[UK: ˈflɪ.pənt] [US: ˈflɪ.pənt]
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