Tā chéngrèn zìjǐ dà cuò tè cuò, yuànyì chéngdān hòuguǒ.
He admits he was utterly wrong and is willing to face the consequences.
Tips
history
From Zeng Pu's 《孽海花》 (late Qing, chapter 25): '如今想来,真是大错特错!' — 'looking back, it really was utterly wrong!'. The doubled structure 大X特X is a productive intensifier.
grammar
The 大X特X template is a strong emphasis pattern found in other idioms: 大吵特吵 (to argue fiercely), 大书特书 (to write lavishly of). The meaning is always 'X to a very great degree'.
