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Jyutping gaau2 mat1 gwai2 aa3
Pinyin gǎo miē guǐ ya

Definitions (CC-CANTO)
  1. what's going on?; what the heck are you doing? [colloquial]
Definitions (粵典–words.hk)
  1. x
Examples (粵典–words.hk)
  1. Cantonese
    你件衫搞乜鬼呀?打晒褶咁嘅?
    你件衫搞乜鬼呀?打晒褶咁嘅?
    • How the heck is your shirt doing ? all ruffled ?
Examples (Wiktionary)
  1. Cantonese
    你搞乜鬼呀?
    你搞乜鬼呀?
    nei5 gaau2 mat1 gwai2 aa3?
    • What the hell are you doing?