have someone by the balls

US /hæv ˈsʌmˌwʌn baɪ ðə bɔlz/
UK /hæv ˈsʌmˌwʌn baɪ ðə bɔlz/
"have someone by the balls" picture
1.

avere qualcuno in pugno, controllare completamente qualcuno

(vulgar slang) to have complete control over someone, especially by having information that could harm them

:
The prosecutor really had him by the balls with all the evidence.
Il procuratore lo aveva in pugno con tutte le prove.
If you owe them money, they'll have you by the balls.
Se gli devi dei soldi, ti avranno in pugno.