大錯特錯

大错特错
dàcuòtècuò
to be gravely mistaken (idiom)

CEDICT

to be as wrong as wrong can be; to be utterly wrong; to be grievously mistaken

Wiktionary

形容所犯錯誤到達極點。

重編國語辭典

形容所犯錯誤到達極點

維基詞典

Examples

大错特错

It's dead wrong.

Source: Tatoeba

Entry Composition

1 大錯 dàcuò blunder
2 特 tè
  1. special
  2. unique
  3. distinguished
  4. especially
  5. unusual
  6. very
  7. abbr. for 特克斯 tèkèsī, tex
3 錯 cuò
  1. mistake
  2. wrong
  3. bad
  4. interlocking
  5. complex
  6. to grind
  7. to polish
  8. to alternate
  9. to stagger
  10. to miss
  11. to let slip
  12. to evade
  13. to inlay with gold or silver