lick your lips
lick (one's) lips
To be eager and/or show signs of excitement before or during doing something that one enjoys or that is or will be beneficial to one. A reference to literally licking one's lips in anticipation of eating something delicious. All of the scouts are really licking their lips to get Jones on their roster. You should have seen John at the car show—he was practically licking his lips.
lick (or smack) your lips (or chops)look forward to something with eager anticipation.
1997 Guardian Headhunting agencies licked their chops at the prospect of the fat placement fees.
lick/smack your ˈlips
1 move your tongue over your lips, especially before eating something good
2 (informal) show that you are excited about something and want it to happen soon: They were licking their lips at the thought of clinching the deal.