What does the sad frog mean by patting his back and leaving a red handprint?

Express dissatisfaction or laugh at yourself. According to Sohu's query. Com, the sad frog patted him on the back and left a red handprint, which is an expression in the sad frog expression pack, expressing a feeling of dissatisfaction or disappointment, but it can also be used to enhance the sense of humor and self-mockery. Sad frog is an expression pack that became popular on 20 14.