Used when someone won't stop complaining. Should be repeated in an aggressive tone if the person responds.
Person 1: Man, this weather is really something. I can't stand all this rain.
Person 2: Cry in your oatmeal.
Person 1: What?
Person: CRY IN YOUR OATMEAL!!
Person 2: Cry in your oatmeal.
Person 1: What?
Person: CRY IN YOUR OATMEAL!!
by JWN in the LOU March 16, 2011