lip-smacking

Etymology
See.

Adjective

 * 1)  Tasty; appetizing.

Adverb

 * 1)  Very.
 * Aunt Bessy's Easter ham is always lip-smacking good.

Usage notes

 * Only used for positive adjectives relating to taste, smell, and the mouth, or suggesting deliciousness or desirability.

Noun

 * 1) The act or an instance of smacking one's lips.