坐在坟头唱忐忑新婚之夜唱嫁衣

'Sitting on the grave singing anxiety and wearing bridal clothes during the wedding night'. Such an odd nickname paints the picture of extreme emotional contrast or cultural irony - sitting atop graves, a place for mourning and remembrance, contrasts sharply with celebratory singing and matrimonial garments. This could reflect someone who faces significant internal conflict between dark moods/sad experiences or events and happiness, or a mocking attitude towards the societal norms related to death and marriage rituals.