喺孔夫子面前賣文章 [－－－－－－卖－－]

Jyutping hai2 hung2 fu1 zi2 min6 cin4 maai6 man4 zoeng1
Pinyin béi kǒng fū zǐ miàn qián mài wén zhāng

Definitions (CC-CANTO)
  1. to show off in front of an expert, it means people who overestimate themselves