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Jyutping coi2 daan6
Pinyin cǎi dàn

Definitions (粵典–words.hk)
  1. 名詞
    電影​入面​如果​唔​仔細​揾​,​就​會​忽略​嘅​有趣​情節​;​又​或​指​影片​結束​之​後​,​出​現​嘅​電​影片​段​(​通常​係​一​啲​幽默​嘅​場​景​或者​同續​集有​關​嘅​情​節​、​線索​)
    bonus scene or extra scene after the credit scene in movies; literally, Easter eggs in movie or interesting scenes that are easily ignored

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Jyutping coi2 daan2
Pinyin cǎi dàn

Definitions (CC-CEDICT)
  1. painted eggshell
  2. Easter egg
  3. (media) Easter egg (hidden feature in software or a movie etc)
  4. post-credits scene
Definitions (Wiktionary)
  1. noun
    painted eggshell (or similar-looking objects)
  2. noun
    century egg
  3. noun
    decorated egg; Fabergé egg