lick (or smack) your lips (or chops) look forward to something with eager anticipation.

2012Tim HarfordDear Economist Presumably the likes of Google and Facebook are licking their lips as they contemplate their role in creating digital identities where your punctuality on eBay, efficiency on TaskRabbit and cleanliness as an Airbnb guest can be stitched together in a seamless tapestry of reputational capital.