[--]

Jyutping biu2 suk1
Pinyin biǎo shú

Definitions (Wiktionary)
  1. noun
    cousin-uncle (father's 表弟; paternal grandmother's sibling's or paternal grandfather's sister's son younger than one's father)
  2. noun, Hong-Kong, slang
    a man, especially an official, from Mainland China

[--]

Jyutping biu2 suk1
Pinyin biǎo shū

Definitions (CC-CEDICT)
  1. son of grandfather's sister
  2. son of grandmother's brother or sister
  3. father's younger male cousin
  4. (Hong Kong slang) mainlander
Definitions (粵典–words.hk)
  1. 名詞
    指父​親​嘅​表弟
    male cousin of one's father
  2. 名詞
    (​舊式​)​來​自大​陸​,​尤其​指官員​,​去​香港​工作​嘅​男人
    used to refer to a male from mainland China, especially government officer, go to work in Hong Kong
Definitions (Wiktionary)
  1. noun
    cousin-uncle (father's 表弟; paternal grandmother's sibling's or paternal grandfather's sister's son younger than one's father)
  2. noun, Hong-Kong, slang
    a man, especially an official, from Mainland China