a t-like sound made by suction rather than plosion; conventional spelling pronunciation, tisk American Heritage D.

D'Oh! Now my Cro-Magnon cerebellum gets it, and I'm entirely with Rusty on this one. If I use "tsk" I say "tsk" Never in a million years would I have tried to spell the sound described above as "tsk" - where is the friggin' k?!