mouth off片語動詞KK [maʊθ ɔf] /maʊθ ɔf/發音片語動詞1頂嘴、出言不遜、無禮反駁口語He got detention for mouthing off to his teacher again.他又對老師出言不遜,被留校處罰。2大放厥詞、大發議論、誇口口語She's always mouthing off about politics at family dinners.她總在家庭聚餐上對政治大放厥詞。