[pronounced as an alveolar click; spelling pronunciation tisk or tisk-tisk]
(used, often in quick repetition, as an exclamation of contempt, disdain, impatience, etc.)
an exclamation of “tsk.”
verb (used without object)
to utter the exclamation “tsk.”
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
sound expressing commisseration or disapproval, 1947; as a verb, tsk-tsk is recorded from 1967.
Online Etymology Dictionary, © 2010 Douglas Harper