老鼠仔 [－－－]

Jyutping lou5 syu2 zai2
Pinyin lǎo shǔ zǎi

Definitions (粵典–words.hk)
  1. 名詞
    二頭​肌​嘅​俗​稱​，​即​係​上臂​嘅​肌肉​（​量​詞​：​隻​）
    biceps, referring to the shape of the muscles when flexed; literally: small mouse
    • 你睇下我隻老鼠仔，練咗兩個月㗎！
      你睇下我只老鼠仔，练咗两个月㗎！
      nei5 tai2 haa5 ngo5 zek3 lou5 syu2 zai2, lin6 zo2 loeng5 go3 jyut6 gaa3!
      Look at my biceps. I've trained for 2 months!
Definitions (Wiktionary)
  1. noun, Cantonese, figuratively, humorous
    biceps muscle, especially when flexed (Classifier: 隻／只 c)
    (syn.) 小老鼠
  2. noun, Hakka
    mouse; rat (Classifier: 隻／只 h)
  3. noun, Cantonese
    small mouse or rat (Classifier: 隻／只 c)
Definitions (Kaifangcidian)
  1. 二頭肌 – 二头肌
  2. 胳膊上的腱子

老鼠仔 [－－－]

Jyutping lou5 syu2 zai2
Pinyin lǎo shǔ zǐ

Definitions (CC-CANTO)
  1. muscular biceps; literally 'small rat'(same shape)
Examples (粵典–words.hk)
  1. Cantonese
    你睇下我只老鼠仔，练咗两个月㗎！
    你睇下我隻老鼠仔，練咗兩個月㗎！
    nei5 tai2 haa5 ngo5 zek3 lou5 syu2 zai2, lin6 zo2 loeng5 go3 jyut6 gaa3!
    • Look at my biceps. I've trained for 2 months!