萬人空巷

万人空巷
wànrénkōngxiàng
  1. the multitudes come out from everywhere, emptying every alleyway (to celebrate)
  2. the whole town turns out

CEDICT

the whole town turns out to (an event); all of the people in a place have turned out to (an event)

Wiktionary

形容擁擠熱鬧盛況

重編國語辭典

形容一事轟動熱鬧盛況

維基詞典

Entry Composition