tut-tut

[pronounced as two alveolar clicks; spelling pronunciation tuht-tuht] /pronounced as two alveolar clicks; spelling pronunciation ˈtʌtˈtʌt/
interjection, noun, verb (used without object), tut-tutted, tut-tutting.
1.
tut.
Origin
1585-95
British Dictionary definitions for tut-tut

tut-tut

/pronounced as alveolar clicks; spelling pron ˈtʌtˈtʌt/
interjection
1.
an exclamation of mild reprimand, disapproval, or surprise
verb -tuts, -tutting, -tutted
2.
(intransitive) to express disapproval by the exclamation of "tut-tut"
noun
3.
the act of tut-tutting
Often shortened to tut