from one sonovabitch to another
Reminds me of one of my favorite scenes from the movie Patton.
Translator: The general would like to know if you will drink a toast with him.
Patton: Thank the general and tell him I have no desire to drink with him or any other Russian son of a bitch.
Translator: [Nervous] I can't tell him that!
Patton: Tell him, every word.
Translator: [In Russian] He says he will not drink with you or any Russian son of a bitch.
Russian general: [In Russian] Tell him he is a son of a bitch, too. Now!
Translator: [Very nervous] He says he thinks you are a son of a bitch, too.
Patton: [laughing] All right. All right, tell him I'll drink to that; one son of a bitch to another.