Laugh on the Other Side of Your Mouth
To make a person laugh on the other side of his mouth is to make him cry, or to cause him annoyance. To “laugh on the wrong side of one's face” is to be humiliated, or to lament from annoyance.
“Thou laughest there by-and-by thou wilt laugh on the wrong side of
thy face.” —
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894