"Laughing out of the wrong side of one's mouth" is a phrase that describes the experience of being forced to hide one's true feelings or opinions, often as a result of a situation that is not ideal or desired. Synonyms for this phrase include "grin and bear it," "put on a brave face," and "smile through the pain." Other alternatives may include "painting on a happy face," "faking it 'til you make it," and "suppressing one's true emotions." These phrases all suggest the idea of putting on a façade or pretending to be happy or content, even when one is not.