腦洞大開 [脑－－开]

Jyutping nou5 dung6 daai6 hoi1
Pinyin nǎo dòng dà kāi

Definitions (Wiktionary)
  1. verb, neologism, slang
    to greatly open up one's eyes (said of unusual, weird ideas)

腦洞大開 [脑－－开]

Jyutping
Pinyin nǎo dòng dà kāi

Definitions (CC-CEDICT)
  1. imaginative
  2. to have one's mind buzzing with ideas