A Puffed Up Frog Is Mostly Wind A frog looks big when it puffs out its belly, but it really doesn't contain much meat. This expression is used to make fun of people who are more adept at boasting than anything else.
青蛙肚皮雖然看起來很大，但實際上肉卻不多，這句俗語的意思是諷刺一個人雖然善於吹牛，其實沒有多少實力。