noun, noun or participle which takes 'suru', intransitive verb
clicking one's tongue; tut-tut
Usually a small tongue click expressing irritation, impatience, disapproval, or frustration. Often used as 舌打ちする.
彼は不満そうに舌打ちした。
He clicked his tongue in apparent dissatisfaction.
店員の前で舌打ちするのは失礼だ。
It is rude to click your tongue in front of the clerk.
noun, noun or participle which takes 'suru', intransitive verb
smacking one's lips with relish
Less common positive use for making a tongue or lip-smacking sound because something tastes good; in modern Japanese, 舌鼓を打つ is the clearer expression for enjoying delicious food.
古い用法では、「舌打ち」がごちそうを味わって舌を鳴らすことを指す場合もある。
In an older or less common use, 舌打ち can refer to making a pleased tongue-smacking sound while enjoying a feast.