have someone by the balls
US /hæv ˈsʌmˌwʌn baɪ ðə bɔlz/
UK /hæv ˈsʌmˌwʌn baɪ ðə bɔlz/

1.
누군가를 완전히 쥐고 있다, 누군가의 약점을 잡고 있다
(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.
검사는 모든 증거로 그를 완전히 쥐고 있었다.
•
If you owe them money, they'll have you by the balls.
그들에게 돈을 빚지면, 그들은 너를 완전히 쥐고 있을 것이다.