main man

1. One's best or very good male friend. Hey, I want you to come meet my main man, Will! He and I go back a long way.

2. One's male romantic partner or lover. I hear Julie's got a new main man in her life. They met at a yoga retreat in India!

3. The most influential male in a given group, such as a boss or leader. With his new promotion, Jared's going to be the main man of the office next month!