突破盲腸 [－－－肠]

Jyutping dat6 po3 maang4 coeng2
Pinyin tū pò máng cháng

Definitions (粵典–words.hk)
  1. 語句、潮語、香港
    「​突破​盲點​」​嘅​變​體​；​指講出​、​揾​到​其他人​都​冇​注意​嘅​重​點
    to state a point which nobody is aware of