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Jyutping zit1 jyu4 daan2
Pinyin jī yú dàn

Definitions (粵典–words.hk)
  1. 動詞、俚語、黃賭毒
    搓​女性​胸部​,​引伸​指魚​蛋檔​提供​嘅​性​服​務​,​淨摸​,​唔​會​做​愛
    to grasp a woman's breast, also means sexual services offered to customers at "fish ball stall" (falling short of full sexual intercourse)
  2. 近義詞
    打魚蛋、搓魚蛋
  3. 參看
    擳魚蛋
  4. 動詞
    整魚​蛋​嘅​手​勢​:​攞​起​一​舊​打成​膠​嘅​魚​肉​,​放響​手心​,​食指​母指圍​成圓圈​,​其餘​手指​收緊​將魚​肉經​手指​圈擠​壓出​嚟​,​形成​一個​球體
    the hand gesture to make fish ball : put some sticky fish paste on hand, make a circle with index finger and thumb, contract other fingers to squeeze the paste thought the circle, to form a sphere

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Jyutping zik1 jyu4 daan2
Pinyin jī yú dàn

Definitions (CC-CANTO)
  1. to squeeze a woman's breast; to make cotton buds in prison service [colloquial]