招摇过市

招搖過市
zhāoyáoguòshì
(idiom) to parade oneself ostentatiously about town

CEDICT

to act ostentatiously in public; to flaunt one's scandals

Wiktionary

语本《史记．卷四七．孔子世家》：「居卫月馀，灵公与夫人同车，宦者雍渠参乘，出，使孔子为次乘，招摇市过之。」指故意在人多的地方夸耀自己，以引人注意。

重編國語辭典

Entry Composition

1 招摇 zhāoyáo
  1. to rock back and forth
  2. (fig.) to act ostentatiously
  3. to brag
  4. to show off
=2 过 guò
  1. to cross
  2. to go over
  3. to pass (time)
  4. to celebrate (a holiday)
  5. to live
  6. to get along
  7. excessively
  8. too-
=2 过 guo (experienced action marker)
3 市 shì
  1. market
  2. city
  3. municipality (administrative unit)
  4. (literary) to trade; to buy and sell goods