laugh on the other side of your face
laugh on the other side of (one's) face
To experience a drastic change in one's emotions, often in a short span of time. A: "I thought your mother was happy that we're getting married." B: "Me too, but now she's laughing on the other side of her face, and I get an angry phone call from her every day."
laugh on the other side of your facebe discomfited after feeling satisfaction or confidence about something.
A North American variant of this expression is laugh out of the other side of your mouth .