有頭冇尾 [－头－－]

Jyutping jau5 tau4 mou5 mei5
Pinyin yǒu tóu mǎo wěi

Definitions (CC-CANTO)
  1. (adjective) finish a task/job incompletely
Definitions (Wiktionary)
  1. adj, Cantonese
    having a start but not a finish
    (syn.) 有始無終, 有始无终
Definitions (Kaifangcidian)
  1. 虎頭蛇尾 – 虎头蛇尾
  2. 有始無終 – 有始无终
Examples (粵典–words.hk)
  1. Cantonese
    佢好马虎㗎，做嘢有头冇尾。
    佢好馬虎㗎，做嘢有頭冇尾。
    keoi5 hou2 maa1 fu1 gaa3, zou6 je5 jau5 tau4 mou5 mei5.
    • He is quite careless, never being able to finish what he started.