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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
What is the origin of the idiom "teach one's grandmother to suck eggs" and when to use it?
The idiom "teach one's grandmother to suck eggs" is believed to have originated in the 18th century. It refers to the act of offering unsolicited advice or instruction to someone who is already experienced or knowledgeable in that particular area. The phrase humorously suggests that it is unnecessary to try to teach someone a skill or knowledge they already possess, especially when the person providing the advice is less experienced or knowledgeable than the recipient.