好酒沉瓮底

好酒沉甕底
hǎojiǔchénwèng
  1. lit. the best wine is at the bottom of the jug (idiom)
  2. fig. the best is saved for last

CEDICT

The best is saved for last; It ain't over until the fat lady sings.

Wiktionary

谚语香醇比喻好戏在后头

重編國語辭典

Entry Composition