A term for one's significant other, to be used by adult heterosexual couples in long-term or lifelong, monogamous relationships who are serious, live together and have built their lives together, but have yet to get engaged or don'
t intend to marry at all.
Where "boyfriend/girlfriend" is too childish, "husband/
wife" doesn'
t apply, "fiance" is dishonest, "partner" sounds
homosexual and "lover" is too sexual, there is serioso. Coined by Chemda of the Keith and The Girl podcast, episode 130.