借りてきた猫
Meanings
1
someone who is suddenly quiet and meek
Idiomatic expression likening a person to a borrowed cat that is unusually timid and reserved in an unfamiliar environment. Often used when someone who is normally outgoing becomes shy or silent in a particular situation.
He's usually noisy, but today he's as quiet as a borrowed cat.
At her first meeting, she was as meek as a borrowed cat.