prick ears up
prick your ears upalso prick up your ears
to listen carefully If you hear my name mentioned, prick up your ears – I want to know what you find out.
prick your ears up(informal)
to start to listen carefully to what someone is saying, often because you think you may find out something interesting
Usage notes: Many animals prick up (= raise) their ears when they hear something.Eve pricked her ears up when she heard her name being mentioned.