隔靴搔癢 [－－－痒]

Jyutping gaak3 hoe1 sou1 joeng5
Pinyin gé xuē sāo yǎng

Definitions (CC-CEDICT)
  1. lit. to scratch the outside of the boot (idiom)
  2. fig. beside the point
  3. ineffectual
Definitions (粵典–words.hk)
  1. 語句
    講​嘢​或者​做​嘢​冇​重點​，​不切​實際
    (lit.) to scratch an itch that is under a boot; (fig.) the pointlessness of one's speech or deeds
    • 外行人學講內行話，總覺得係隔靴搔癢。
      外行人学讲内行话，总觉得系隔靴搔痒。
      It always comes to me as irritatingly pointless to hear amateurs using the insiders' language.
Examples (粵典–words.hk)
  1. Cantonese
    外行人学讲内行话，总觉得系隔靴搔痒。
    外行人學講內行話，總覺得係隔靴搔癢。
    • It always comes to me as irritatingly pointless to hear amateurs using the insiders' language.