A heterosexual man in relation to another heterosexual man with whom he has an intense bromance.
Girl: What are you doing later tonight?
Guy: I have plans -I'm catching a movie with my brusband.
Slang term used in the Will & Grace sitcom to describe a non-heterosexual marriage, wherein the standard terms "husband" and "wife" do not necessarily fully describe the relationship between two people being united.
Could be applied to male, female, or transexual couples.(From urbandictionary.com)