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Jyutping si2 fat1 gwai2
Pinyin shǐ hū guǐ

Definitions (CC-CANTO)
  1. describes a person being inconsistent (changing of mind) and/or who often does things secretly; can be used to describes a man who is homosexual (gay); a jerk; someone who is two-faced
Definitions (粵典–words.hk)
  1. 名詞、俚語
    鬧​人​嘅​時​候​用​,​冇​乜​特別​意思​,​純粹​表示​惡意
    asshole
    • 你條屎忽鬼,又話幫我買飯又冇買。
      你条屎忽鬼,又话帮我买饭又没买。
      You asshole. You said you would buy me food and why are you empty-handed?
  2. 名詞、俚語
    對​男性​同性​戀者​表示​惡​意​嘅​稱​呼
    faggot; literally "ass-ghost"
  3. 參看
    屎窟鬼
Examples (粵典–words.hk)
  1. Cantonese
    屎忽鬼
    屎忽鬼
    si2 fat1 gwai2
    • a genral derogative with no specific meaning or gender; literally: ass ghost
  2. Cantonese
    你条屎忽鬼,又话帮我买饭又没买。
    你條屎忽鬼,又話幫我買飯又冇買。
    • You asshole. You said you would buy me food and why are you empty-handed?