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
Britishhumoristiskt
idiom
stötande
Exempel
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.
