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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
Humorous
Idiom
OffensiveWhat 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.
例子
The manager responded, "Don't teach your grandmother to suck eggs."
John, please don't teach your grandmother how to suck eggs.
Don't try to teach your grandmother to suck eggs by telling me how to play a scale.
Don't teach your grandmother to suck eggs!
These young hotshots come in and try to prove they know the ropes better than we do, like they're teaching their grandmothers how to suck eggs.
