to teach one's grandmother (how) to suck eggs
01
班门弄斧, 教内行人做事
to offer unnecessary or redundant instruction or advice to someone who is already experienced or knowledgeable in that particular area
Dialect
British
幽默
习语
冒犯性
例子
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.
别教玛丽亚怎么经营餐厅,那简直是班门弄斧。



























