吹牛不打草稿 [－－－－－－]

Jyutping ceoi1 ngau4 bat1 daa2 cou2 gou2
Pinyin chuī niú bù dǎ cǎo gǎo

Definitions (Wiktionary)
  1. phrase, idiomatic
    wild bragging
    (syn.) 吹水唔抹嘴