Tut/tʌt/ Definition 1 of 1Pro Tip 1/3Disapproval Sound Tut is used to express mild disappointment or annoyance with someone's actions. Tut, you should have arrived on time. Pro Tip 2/3Solo Use Common Often said by itself, 'tut' can be a standalone remark without further explanation. You forgot your keys again? Tut. Pro Tip 3/3Not Harsh Criticism 'Tut' indicates mild criticism, less severe than outright scolding or verbal criticism. Tut, that's not how you do it.