Learn how to say Tsk correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word tsk tsk:
used to express disapproval or annoyance:
you of all people, Goldie—tsk, tsk
(tsk-tsk) [no object] make an exclamation expressing disapproval or annoyance:
even Elvis had his detractors who tsk-tsked over his indulgences