In cahoots with.
→한통속이 되다.

[예문]

A : Did you notice how John gets all the promotions?
A : 너 존이 승진한 거 봤니?

B : Yeah, I did notice that. I wonder who he is in cahoots with.
B: 응, 봤어. 난 그가 누구랑 한통속인지 궁금해.

A : You're right. He never seems to have to work for his advances.
A : 맞아. 이번 진급을 할 만큼 일을 열심히 한 것 같진 않은데 말이지.

B : Let's keep our eyes open and see who he is talking with.
B : 정신 차리고 그가 누구와 이야기하는지 한번 보자고.

A : Hey, look over there now.
A : 야, 저기 좀 봐.

B : So that's it. He is good friends with the boss!
B : 그래 그랬구나. 상사랑 친구 사이였어!