強不知以為知 [强－－－为－]

Jyutping koeng4 bat1 zi1 ji5 wai4 zi1
Pinyin qiǎng bù zhī yǐ wéi zhī

Definitions (Wiktionary)
  1. phrase, idiomatic
    to pretend to know something that one does not know; to be a sciolist