each one's grandmother to suck eggs

učit orla létat

Don't teach your grandmother to suck eggs.

But before you dismiss me as a complete novice or decide that I am probably trying to teach my Grandmother to suck eggs, I'd like to give you an idea about a little project for the weekend.

I am not trying to teach anyone's grandmother to suck eggs, but this is beginning to resemble a Second Reading debate.

(Google)

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