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Jyutping daai6 haa1 sai3 bei2 si2 wai3
Pinyin dà xiā xì bǐ shǐ wèi

Definitions (粵典–words.hk)
  1. 語句、舊式
    用​嚟​鬧​啲​蝦​蝦​霸​霸​嘅​人​嘅​講​法
    an exclamation used to tell a bully to desist, "piss of you bully!"; literally, big (who) bullies small is fed with faeces
  2. 參看
    大蝦細畀屎餵

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Jyutping daai6 haa1 sai3 bei2 si2 wai3
Pinyin dā4xia xì bǐ shǐ wèi

Definitions (CC-CANTO)
  1. a phrase used to bullies (in particular those who pick up those smaller or weaker than them) to get lost [colloquial]