龜兒子 [龟儿－]

Jyutping gwai1 ji4 zi2
Pinyin guī ér zi

Definitions (CC-CEDICT)
  1. (coll.) bastard
  2. son of a bitch
Definitions (Wiktionary)
  1. noun, colloquial, derogatory, offensive, regional
    bastard; son of a bitch