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to teach one's grandmother (how) to suck eggs
to teach one's grandmother (how) to suck eggs
01
to offer unnecessary or redundant instruction or advice to someone who is already experienced or knowledgeable in that particular area
Dialect
British
British
Humorous
Idiom
Offensive
Beispiele
Sarah, I've been playing the piano for years. Do n't try to teach your grandmother to suck eggs by telling me how to play a scale.
