be laughing on the other side of face (redirected from be laughing out of the other side of mouth)

be laughing on the other side of your face  (British, American & Australian informal) also be laughing out of the other side of your mouth (American & Australian informal)

if you say someone who is happy will be laughing on the other side of their face, you are angry about the thing that is making them happy and think that something will soon happen to upset them You'll be laughing out of the other side of your face if you fail your exams.

See also: face, laugh, other, side