english
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see under IN ONE EAR.
American Heritage Idioms
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Phrase(s): go in one ear and out the other Cliché Fig. [for something] to be heard and then soon ignored or forgotten. • Everything I say to you seems to go in one ear and out the other. Why don’t you pay attention? • I can’t concentrate. Things people say to me just go in one ear and out the other.
McGrawhill's American Idioms And Phrasal Verbs