ho-hum /ˈhoʊˈhʌm/ adjective Learner's definition of HO-HUM
[more ho-hum; most ho-hum] informal
: having or showing no excitement or enthusiasm无兴趣的;冷漠的 -
He's been leading a very ho-hum [=dull, boring] existence.他过得很无聊。
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I don't see how you could be so ho-hum [=indifferent] about this movie.我不明白你为何对这部电影如此不感兴趣。