吃不到的葡萄是酸的 [－－－－－－－－－]

Jyutping hek3 bat1 dou3 dik1 pou4 tou4 si6 syun1 dik1
Pinyin chī bu dào de pú tao shì suān de

Definitions (CC-CANTO)
  1. lit. grapes that one had no chance to eat turns sour, meaning one becoming jealous of missing out on a chance
Definitions (Wiktionary)
  1. phrase
    the grapes are sour anyway