As polyamory has grown as a relationship model, it has developed its own vocabulary. Folks in poly relationships will talk about "compersion," a feeling of joy at the happiness of a partner in a new relationship, and "new relationship energy" or NRE, the giddy, honeymoon phase of a newfound love. You might hear someone talk about "wibbles," or minor twinges of jealousy. An OSO is a person's "other significant other."
