管他三七二十一

guǎntāsānqī'èrshíyī ㄍㄨㄢˇ ㄊㄚ ㄙㄢ ㄑㄧ ㄦˋ ㄕˊ ㄧ

    • who cares
    • no matter what
    • regardless of the consequences

Character by character

Saying俗语俗語

Idiom惯用语 · In everyday use

Literally
never mind that three sevens are twenty-one
Meaning
To go ahead regardless of the consequences or the rules. Usually said as 不管三七二十一. Can be reckless or carefree.

Sources