be licking (one's) lips(redirected from are licking their lips)
be licking (one's) lips
To be eager and/or show signs of excitement before or during 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.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
be licking your lips
If someone is looking forward eagerly to a future event, you can say that they are licking their lips. Peter says the Government may collapse. You can almost see him licking his lips. Billy is licking his lips about putting me through his training sessions. Note: You can also say that someone is licking their chops. After hearing the president's plan for economic recovery, they were licking their chops.
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012