(xiehouyu) To be incredibly bold or audacious. This is a pun on the literal image of tying chicken feathers to a flagpole to make a massive feather duster [[鸡毛掸子|雞毛撣子|ji1 mao2 dan3 zi5]]. The word for duster, [[掸子|撣子|dan3 zi5]], sounds like the word for courage or gall, [[胆子|膽子|dan3 zi5]].