effusion       
noun uk/ɪˈfjuː.ʒən/ us/ɪˈfjuː.ʒən/
 [ C usually singular ] literary(强烈感情的)迸发,倾泻 
a sudden and uncontrolled expression of strong emotion
  an effusion of anger and despair 突然陷入愤怒和绝望之中 
 The effusion of patriotic expression after the Sept. 11 attacks cut across class lines.
 - More examples
 - His latest effusion is as pleasant as a painted tin of shortbread and as comfy as an elasticated waistband.
 - Each girl felt guilty of a maudlin effusion of sentiment.
 - The cleverness of his writing deflates amid his effusions of feeling.