also: したづつみ
smacking one's lips; lip-smacking
Almost exclusively used in the set phrase 舌鼓を打つ, meaning to smack one's lips in enjoyment of food. The noun itself is rarely used independently.
See also: 舌鼓を打つ
He smacked his lips at how delicious the food was.
I savored the steak, smacking my lips.