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grandmother

mastery

UK /ˈɡɹæn(d)ˌmʌðə(r)/ US /ˈɡɹæn(d)ˌmʌðɚ/noun

card 1 of 6 · idiom meaning

What does the idiom 'don't teach your grandmother how to milk ducks' mean?

What does the idiom 'don't teach your grandmother how to milk ducks' mean?