do a number on

US /duː ə ˈnʌm.bər ɑn/
UK /duː ə ˈnʌm.bər ɑn/
"do a number on" picture
1.

大きな被害を与える, ひどい目に遭わせる

to cause harm or damage to someone or something

:
The storm really did a number on our garden.
嵐は私たちの庭に本当に大きな被害を与えた
His ex-girlfriend really did a number on him emotionally.
彼の元カノは彼に精神的に本当に大きなダメージを与えた
2.

騙す, 欺く

to trick or deceive someone, often in a harmful way

:
The con artist really did a number on those unsuspecting tourists.
詐欺師は本当にあの無警戒な観光客を騙した
I think he's trying to do a number on me to get me to agree.
彼は私を騙して同意させようとしていると思う。