这个短语的字面解释是“好到要舔手指头”，这是什么意思呢？请看对话：

    A: Here are the cookies my girlfriend baked at home. Want to try some?

    B: Sure, thanks. ... They are finger lickin’ good!

    Note: This idiom means something is excellent — especially of food. It’s known primarily as the slogan of the KFC food chain. This advertising slogan of KFC has proved highly successful and long-lasting. KFC was founded by Harland David Sanders, better known as Colonel Sanders. Clearly, the allusion in the slogan is to the fact that KFC products are normally eaten without the aid of a knife and fork. There are also songs and an album by this name.