An exclamation of disapproval is an expression of disapproval or disappointment. The three most common expressions of this are 'TUT', 'Fie' and 'Tsk'. 'TUT' is an expression of mild disapproval, often used to express disappointment or disapproval of someone's behavior. 'Fie' is a stronger expression of disapproval, usually used to express strong disapproval or outrage. 'Tsk' is a sound made to express disapproval or disappointment, often accompanied by a shaking of the head.