quiet as a mouse

Idioms  

1. Also, still as a mouse. Silent, without noise, as in She sneaked into the house, quiet as a mouse, or When he heard the news he was still as a mouse. The first of these similes dates from the mid-1500s, the second from the 1300s.

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Example Sentences

"My own self catering business at the end of June and July is quiet as a mouse. I am very worried," she says.

From BBC

“She would make the bed up nice and straight, then put another bedspread on top and I would lie there under the board, quiet as a mouse,” Fixler recalled.

From Washington Post

I thought about all the small ways Dovid and Haskel poked fun at me—prude, frigid, prissy, frum, pious, cold, quiet as a mouse—and I lowered my eyes to the ground because I was too embarrassed to meet Frankie’s gaze.

From Literature

“You’ve been quiet as a mouse all day,” she said.

From Literature

Around this time, I slowly began to learn who depression was myself: quiet as a mouse, but cuts deep as a dagger.

From Salon