greeneckathorn
a series of hysterical laughter and uncontrollable sobbing in one sitting. it sounds bipolar, but the laughing and crying is for no specific reason and is often completely out of the blue. the act is sort of mean, because no one knows what to say or how to help.. do they try to comfort you? or laugh with you?
my mom feared i would have a greeneckathorn when she told me my sister was getting married.