plastic smile(redirected from one's plastic smile)
A forced, artificial smile; a smile someone wears despite having no feelings of happiness or joy. John seemed fine at first glance, but before long, I could tell that he was wearing a plastic smile and that something was bothering him. Look at that his big plastic smile—he's such a conman! I sure hope he doesn't win the election.
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.