When a play in a sports game is so good, you just have to lick your fingers, just like you had a big ol bucket of colonel Sanders Kentucky fried chicken.

Nickname for a big time chicken eater.
Especially apropos to any individual who eats Popeye's or KFC more than four meals per week or buys a whole barrel (tub) for themself and hides leftovers for snack treats.
Carrying around a plastic bag of "chicken for later" or eating it while driving certainly merits this monicker.

Fingerlickin’ mean your food is good or the thing taste good 👍🏼