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Jyutping hau2 han4
Pinyin kǒu hén

Definitions (CC-CANTO)
  1. normally applies to the feeling of craving of food; to feel peckish
Definitions (粵典–words.hk)
  1. 動詞
    唔​肚​餓​但​係​有​食​嘢​嘅​慾​望
    (lit.) mouth itchy; to have a desire to eat sth
    • 我成日食晚飯食到好飽,但到半夜都會口痕,想食零食。
      我成日食晚饭食到好饱,但到半夜都会口痕,想食零食。
      ngo5 sing4 jat6 sik6 maan5 faan6 sik6 dou3 hou2 baau2, daan6 dou3 bun3 je2 dou1 wui3 hau2 han4, soeng4 sik6 ling4 sik6.
      I often have a full meal for dinner, but when midnight comes, I always want to have snacks so badly.
  2. 動詞
    把​口​唔​識​停​,​會​喺​唔​適​當​嘅​時​候​講​嘢
    inappropriately talkative, tend to talk senselessly
    • 佢成日都口痕,亂咁講嘢。
      佢成日都口痕,乱咁讲嘢。
      keoi5 sing4 jat6 dou1 hau2 han4, lyun2 gam3 gong2 je5.
      She's addicted to senseless talks and says inappropriate stuff.
Definitions (Wiktionary)
  1. adj, Cantonese
    with desire to eat
Definitions (Kaifangcidian)
  1. 嘴巴癢癢 – 嘴巴痒痒
  2. 忍不住想說 – 忍不住想说
Examples (Tatoeba—Cantonese-English)
  1. Cantonese
    你唔系肚饿,你口痕啫。
    你唔係肚餓,你口痕啫。
    nei5 m4 hai6 tou5 ngo6 , nei5 hau2 han4 ze1 。
    • You're not hungry; you're just bored.
Examples (粵典–words.hk)
  1. Cantonese
    我成日食晚饭食到好饱,但到半夜都会口痕,想食零食。
    我成日食晚飯食到好飽,但到半夜都會口痕,想食零食。
    ngo5 sing4 jat6 sik6 maan5 faan6 sik6 dou3 hou2 baau2, daan6 dou3 bun3 je2 dou1 wui3 hau2 han4, soeng4 sik6 ling4 sik6.
    • I often have a full meal for dinner, but when midnight comes, I always want to have snacks so badly.
  2. Cantonese
    佢成日都口痕,乱咁讲嘢。
    佢成日都口痕,亂咁講嘢。
    keoi5 sing4 jat6 dou1 hau2 han4, lyun2 gam3 gong2 je5.
    • She's addicted to senseless talks and says inappropriate stuff.