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Jyutping waa1 gwai2
Pinyin huā guǐ

Definitions (CC-CANTO)
  1. to describe someone who is mischievous, screaming and making strange noises
Definitions (粵典–words.hk)
  1. 名詞
    比喻​冇​時​停​、​嘈​嘈​閉​嘅​細​路​(​量​詞​:​隻​)
    pest; annoying person; naughty child; literally: noisy ghost
    • 你班嘩鬼嘈夠未呀?靜一陣温下書得唔得?
      你班哗鬼嘈够未呀?静一阵温下书得唔得?
      nei5 baan1 waa1 gwai2 cou4 gau3 mei6 aa3? zing6 jat1 zan6 wan1 haa5 syu1 dak1 m4 dak1?
      Have you naughty pests scream enough? Can you guys just sit down and do some reading for a moment?
Definitions (Wiktionary)
  1. noun, Cantonese
    unruly, noisy folks
Definitions (Kaifangcidian)
  1. 小鬼
  2. 調皮鬼 – 调皮鬼
  3. 吵吵嚷嚷的傢伙 – 吵吵嚷嚷的家伙
Examples (粵典–words.hk)
  1. Cantonese
    哗鬼
    嘩鬼
    waa1 gwai2
    • a derogative term against a rowdy crowd; literally: wow ghost
  2. Cantonese
    你班哗鬼嘈够未呀?静一阵温下书得唔得?
    你班嘩鬼嘈夠未呀?靜一陣温下書得唔得?
    nei5 baan1 waa1 gwai2 cou4 gau3 mei6 aa3? zing6 jat1 zan6 wan1 haa5 syu1 dak1 m4 dak1?
    • Have you naughty pests scream enough? Can you guys just sit down and do some reading for a moment?