We say people are 'licking their lips' when they are about to eat something tasty. The phrase can also be used to describe a person's eagerness about an event in the future.
My children were licking their lips when they entered the sweet shop.
You'll be licking your lips when you see the roast dinner I've made!
Dave was licking his lips ahead of the crucial football game.
Don't confuse it with
If you 'lick your wounds', you recover from a defeat. This phrase comes from animals, who often lick their wounds after fighting.
That was an incredible cricket match! The winning team is celebrating on the pitch, whilst the losers have gone to lick their wounds in the clubhouse.
The Monkey Buffet Festival is an annual event held in Lopburi, Thailand to promote tourism. The festival provides food and drink for the monkeys, as a way of thanking them for drawing visitors to the town.