如數家珍 [－数－－]

Jyutping jyu4 sou2 gaa1 zan1
Pinyin rú shǔ jiā zhēn

Definitions (粵典–words.hk)
  1. 形容詞
    好似​數緊​自己​屋企​收埋​嘅​寶​物​咁​，​比喻​某人​對​某​啲​嘢​好​熟識
    very familiar with certain subjects, as if enumerating one's family treasures
    • 毒男阿松一講起萌娘上嚟就如數家珍。
      毒男阿松一讲起萌娘上嚟就如数家珍。
      duk6 naam4 aa3 cung4 jat1 gong2 hei2 mang4 noeng4 soeng5 lei4 zau6 jyu4 sou2 gaa1 zan1.
      The nerd A-chung acts like he is counting the treasures at his home when he's talking about Moe anime girls. (i.e., he's very familiar with Moe anime girls.)

如數家珍 [－数－－]

Jyutping jyu4 sou3 gaa1 zan1
Pinyin rú shǔ jiā zhēn

Definitions (CC-CEDICT)
  1. lit. as if enumerating one's family valuables (idiom)
  2. fig. to be very familiar with a matter
Examples (粵典–words.hk)
  1. Cantonese
    毒男阿松一讲起萌娘上嚟就如数家珍。
    毒男阿松一講起萌娘上嚟就如數家珍。
    duk6 naam4 aa3 cung4 jat1 gong2 hei2 mang4 noeng4 soeng5 lei4 zau6 jyu4 sou2 gaa1 zan1.
    • The nerd A-chung acts like he is counting the treasures at his home when he's talking about Moe anime girls. (i.e., he's very familiar with Moe anime girls.)
  2. Cantonese
    如数家珍
    如數家珍
    jyu4 sou2 gaa1 zan1
    • very familiar with certain subjects, as if enumerating one's family treasures