register on (one's) face(redirected from register on their faces)
register on (one's) face
Of an emotion or mental process, to become apparent or evident through one's facial expression. Anger registered on her face as I told her what happened. I could see confusion registering on everyone's faces when they announced him as the winner.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.