決一勝負 [决－胜负]

Jyutping kyut3 jat1 sing3 fu6
Pinyin jué yī shèng fù

Definitions (Wiktionary)
  1. phrase, idiomatic
    to fight it out; to compete
    (syn.) 见输赢, 见公母, 見輸贏, 見公母