blot your copybook
US /blɑt yər ˈkɑp.i.bʊk/
UK /blɑt yər ˈkɑp.i.bʊk/
1.
玷污名聲, 弄糟記錄
to do something that spoils your good reputation or record
:
•
He was a promising student, but he blotted his copybook by cheating on the final exam.
他曾是一名很有前途的學生，但他因期末考試作弊而玷污了自己的名聲。
•
One mistake could blot your copybook for years to come.
一個錯誤可能會在未來幾年玷污你的名聲。