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/

1.
birini avucunun içine almak, birini kıskıvrak yakalamak
(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.
O sözleşmeyi imzaladıktan sonra şirket onu avucunun içine almıştı.
•
She knew his secret, so she had him by the short and curlies.
Sırrını biliyordu, bu yüzden onu avucunun içine almıştı.