a stick to beat someone with

US /ə stɪk tə biːt ˈsʌm.wʌn wɪθ/
UK /ə stɪk tə biːt ˈsʌm.wʌn wɪθ/
"a stick to beat someone with" picture
1.

un bastone per picchiare qualcuno, un pretesto per criticare

a piece of information or an argument that can be used to criticize or harm someone

:
His past mistakes became a stick to beat him with during the election campaign.
I suoi errori passati sono diventati un bastone per picchiarlo durante la campagna elettorale.
Don't give them a stick to beat you with by admitting your weaknesses.
Non dare loro un bastone per picchiarti ammettendo le tue debolezze.