此地无银三百两

此地無銀三百兩
cǐdìwúyínsānbǎiliǎng
lit. 300 silver taels not hidden here (idiom); fig. to reveal what one intends to hide

CEDICT

a clumsy denial resulting in self-exposure; a very poor lie which reveals the truth; protest one's innocence too much; the lady doth protest too much

Wiktionary

（谚语）相传民间有人把三百两银子埋在地裡，上面插着「此地无银三百两」的牌子，邻居看到，随即挖走，另写上「隔壁张三未曾偷」。比喻想掩饰事实，反而暴露。

重編國語辭典

试图隐藏某事，反而造成此事广为人知。

維基詞典

Entry Composition

1 此地 cǐdì
  1. here
  2. this place
2 无 wú
  1. not to have
  2. no
  3. none
  4. not
  5. to lack
  6. un-
  7. -less
3 银 yín
  1. silver
  2. silver-colored
  3. relating to money or currency
4 三百 Sānbǎi
  1. Used other than figuratively or idiomatically: see 三, 百.
  2. short for 三百篇 (Sānbǎipiān)
5 两 liǎng
  1. two
  2. both
  3. some
  4. a few
  5. tael, unit of weight equal to 50 grams (modern) or 1⁄16 of a catty 斤 jīn (old)