打ㄉㄚˇdǎ腫ㄓㄨㄥˇzhǒng臉ㄌㄧㄢˇliǎn充ㄔㄨㄥchōng胖ㄆㄤˋpàng子ㄗ˙zi

  1. 把自己的臉打腫來冒充胖子。比喻死要面子，搞排場，而不自量力。如：「小王為了擺場面，打腫臉充胖子，一頓飯就吃掉半個月的薪水。」

客無屎另出腸
英lit. to swell one's face up by slapping it to look imposing (idiom)​; to seek to impress by feigning more than one's abilities