lick/smack your 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.