teach your grandmother to suck eggs

"Richard, telling me that is teaching your grandmother to suck eggs.

"Ah, go teach your grandmother to suck eggs, Major" he said.

Catherine said dryly, "There's a saying: teach your grandmother to suck eggs.

Teach your grandmother to suck eggs, Croaker.

Rick switched to English to say, "Gwen, teach your grandmother to suck eggs.

Renfrew muttered, "Go teach your grandmother to suck eggs."

"Go teach your grandmother to suck eggs," Hansen said evenly as he stepped into the tunnel and felt a surge of buoyant energy wrap him.

"Teach your grandmother to suck eggs," said Sister Marion, which baffled Moon somewhat.

But the relationship wasn't always easy: after one particularly harsh command from Lean, Mr. Young looked at him coolly and said, "Don't teach your grandmother to suck eggs."

Would the House accord him its 'customary indulgence'; or would it say: 'Young fellow--teaching your grandmother to suck eggs--shut up!'