At first, it refers to the omen of delicious food, and later it describes the appearance of greed when you see delicious food.

Word decomposition

Interpretation of index finger: a finger next to the thumb: refers to the index finger of the poor family. The second finger of the hand. A poem in Fan Chengda's New Aspiration in Song Dynasty: "In the fog of Lipu Garden, Rongzhou sells wine lightly. Five years, the index finger is nowhere, how can I see Wan Hedong? " Interpretation of hole cleaning in Volume VI of Suiyuan Poetry Supplement: Dynamic (dynamic) changes its original position or leaves its static state, as opposed to static: change. Fluctuation. Floating. Vibration (an object passes through a central position and moves back and forth constantly. Also known as "oscillation").