三天打魚，兩天曬網 [－－－鱼－两－晒网]

Jyutping saam1 tin1 daa2 jyu4 ， loeng5 tin1 saai3 mong5
Pinyin sān tiān dǎ yú ， liǎng tiān shài wǎng

Definitions (Wiktionary)
  1. phrase, figuratively, idiomatic
    to fail to persevere in something; to be unwilling or too lazy to concentrate
    (syn.) 五日打魚, 一暴十寒, 十日曬網, 十日晒网, 三日打魚, 五日打鱼, 兩日曬網, 三日打鱼, 两日晒网

三天打魚，兩天曬網 [－－－鱼－两－晒网]

Jyutping saam1 tin1 daa2 jyu4 , loeng5 tin1 saai3 mong5
Pinyin sān tiān dǎ yú , liǎng tiān shài wǎng

Definitions (CC-CEDICT)
  1. lit. to fish for three days and sun-dry the nets for two days (proverb)
  2. fig. not to persevere in doing sth
  3. to do sth by fits and starts