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.

See also: ear, prick, up

See also:

about (one's) ears
get (one's) ears lowered
all eyes and ears
believe (one's) ears
believe ears
believe one's ears
stop (one's) ears
stop your ears
pop (one's) ears
were

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