掉书袋 diào shū dài

DEFINITIONS

  1. lit. to wave around one's bookbag (idiom)
  2. fig. to show off one's erudition
  3. a person who does so

CHARACTERS

掉 diào turn, move; shake, wag; drop down
书 shū book, letter, document; writings
袋 dài pocket, bag, sack, pouch