(like) water off a duck's back
US /ˈwɔtər ɔf ə dʌks bæk/
UK /ˈwɔtər ɔf ə dʌks bæk/
1.
水泼鸭背, 毫不在乎
criticism or negative comments that have no effect on someone
:
•
He tried to insult her, but it was like water off a duck's back.
他试图侮辱她，但这就像水泼鸭背一样。
•
Criticism rolls off him like water off a duck's back.
批评对他来说就像水泼鸭背一样。