in bed with (someone)

1. In a sexual relationship with another person, especially one that is unseemly or immoral. Did you hear that Todd has been in bed with his secretary? How gauche. The very first rule of being a professor is to never get in bed with one of your students! Why would I be in bed with another man? I'm a married woman!

2. In a business relationship or financial arrangement with another person or group, especially one that is or seems illicit or illegal. I don't trust Albert because I heard he's gotten in bed with the mob. The politician has been accused of being in bed with the oil industry. You know all the pharmaceutical companies are in bed with each other to fix prices.

in bed with

1 having sexual intercourse with. 2 in undesirably close association with. informal

2 2000 Snowboard UK Jackson lies like an oasis of culture and good coffee in a state that is otherwise firmly in bed with gun culture.