打腫臉充胖子 [－肿脸－－－]

Jyutping daa2 zung2 lim5 cung1 bun6 zi2
Pinyin dǎ zhǒng liǎn chōng pàng zi

Definitions (CC-CEDICT)
  1. 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
Definitions (Wiktionary)
  1. phrase, idiomatic
    to boast in a way that actually cause damage to oneself