off the mark
US /ɔːf ðə mɑːrk/
UK /ɔːf ðə mɑːrk/

1.
빗나간, 틀린
incorrect or inaccurate
:
•
His prediction about the election results was completely off the mark.
선거 결과에 대한 그의 예측은 완전히 빗나갔다.
•
Your calculations are a bit off the mark; let's recheck them.
계산이 좀 틀렸어. 다시 확인해 보자.