鬼頭仔 [－头－]

Jyutping gwai2 tau4 zai2
Pinyin guǐ tou zǎi

Definitions (粵典–words.hk)
  1. 名詞、俚語
    叛徒​，​或​指​敵方滲​透入​嚟​我方​嘅​間​諜​，​卧底​。
    a traitor, an informer or spy withing an organisation, a "mole".
    • 我覺得我哋呢度有鬼頭仔，搞到我哋成個計劃都俾敵人知道晒。
      我觉得我哋呢度有鬼头仔，搞到我哋成个计划都俾敌人知道晒。
      I think we have spy inside our team, that makes all our plan exposed to the enemy.
  2. 名詞、俚語
    舊時​香港​警察​隊​，​能夠​用​英文​直接​同​洋人​警官​溝通​（​或者​打小​報告​）​嘅​華​人人​員​或線​人​；​駁腳​偵探
    in old days, local officer or mole who could communicate with foreign police officers in English
  3. 近義詞
    二五仔、內鬼、叛徒
Definitions (Wiktionary)
  1. noun, Cantonese, slang
    traitor within an organization (usually a criminal organization); spy; informant; mole
    (syn.) 二五仔, 内鬼, 内奸, 內奸, 叛徒, 內鬼

鬼頭仔 [－头－]

Jyutping gwai2 tau4 zai2
Pinyin guǐ tóu zǐ

Definitions (CC-CANTO)
  1. a traitor, a term commonly used specifically to refer to a police informant
Examples (粵典–words.hk)
  1. Cantonese
    我觉得我哋呢度有鬼头仔，搞到我哋成个计划都俾敌人知道晒。
    我覺得我哋呢度有鬼頭仔，搞到我哋成個計劃都俾敵人知道晒。
    • I think we have spy inside our team, that makes all our plan exposed to the enemy.