have (got) someone by the short and curlies

US /hæv ɡɑt ˈsʌm.wʌn baɪ ðə ʃɔrt ænd ˈkɜr.liz/
UK /hæv ɡɑt ˈsʌm.wʌn baɪ ðə ʃɔrt ænd ˈkɜr.liz/
"have (got) someone by the short and curlies" picture
1.

完全に支配する, 弱みを握る

(informal, sometimes offensive) to have complete control over someone, especially by having an advantage over them or by knowing something about them that they want to keep secret

:
The company had him by the short and curlies after he signed that contract.
彼がその契約に署名した後、会社は彼を完全に支配していた
She knew his secret, so she had him by the short and curlies.
彼女は彼の秘密を知っていたので、彼を完全に支配していた