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1.
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.
by Sobocime October 03, 2011
 
2.
A 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 the two people being united. Could be applied to male, female, or transexual couples.
"He makes a beautiful wife. Or husband. Or brusband."
by Janet13 December 13, 2005
 
3.
Term to describe one married to their brother.
My brother is my husband, so now he's my brusband.
by Sara March 06, 2005