Plastic smile phrase
A smile that someone makes themselves wear rather than have it naturally.
Come on, don't wear that plastic smile! Tell me your true feelings.
At first glance, you may not notice that the man in the second picture is wearing a plastic smile.
You use fewer face muscles when you put on a plastic smile.
The origin of this phrase is not clear.
Act with more effort or enthusiasm
This is the last round. Come on! Give it some welly!