prick (one's) ears up(redirected from prick your ears up)
prick (one's) ears up
To suddenly pay close attention to something. Be sure to prick your ears up if anything about the case is mentioned. I can't help but prick my ears up if I hear someone say my name—even if they aren't talking about me.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.