屁者先知 [－－－－]

Jyutping pei3 ze2 sin1 zi1
Pinyin pì zhě xiān zhī

Definitions (Wiktionary)
  1. phrase, humorous, idiomatic
    One who farts is the first to notice (the smell of farts); he who smelt it dealt it. (a pseudo-chengyu used to ridicule a person who complains of the smell of flatulence)
Examples (Wiktionary)
  1. Mandarin
    屁者先知
    屁者先知
    pì zhě xiān zhī
    • [jocular] The farter is usually the first to realise (and complain about the fart).