/ tʌt; NAmE / (also ˌtut-ˈtut ) exclamation , noun
used as the written or spoken way of showing the sound that people make when they disapprove of sth :
Tut-tut, I expected better of you.
tut-tuts of disapproval
► tut (also ˌtut-ˈtut ) verb ( -tt- ): [ v ]
He tut-tutted under his breath.