one woman show
basically meaning that a girl wants to be the only in a guy's life... love/relationship wise.
Guy: So what do you think about us having a threesome?
Girl: No thanks hun, I'm just a one woman show.
It can also refer to a guy hanging out with a girl and her not wanting to have other girls hang out with them.
Girl: No thanks hun, I'm just a one woman show.
It can also refer to a guy hanging out with a girl and her not wanting to have other girls hang out with them.