(pronounced as an alveolar click; spelling pron.
(used, often in quick repetition, as an exclamation of contempt, disdain, impatience, etc.)
an exclamation of “tsk.”
to utter the exclamation “tsk.” Also,tsk'tsk'.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.