烏鴉口 [乌鸦－]

Jyutping wu1 aa1 hau2
Pinyin wū yā kǒu

Definitions (CC-CANTO)
  1. a jinxster
Definitions (粵典–words.hk)
  1. 名詞
    指講​啲​唔​吉利​嘅​嘢​嘅​人​（​量​詞​：​把​／​個​）
    doomsayer; someone who makes unauspicious comments; literally: crow's mouth
Definitions (Wiktionary)
  1. noun, Cantonese
    someone who makes inauspicious remarks; vocal pessimist; doomsayer; croaker; jinx
    (syn.) 烏鴉嘴, 烏鴉口, 烏鴉喙