1. A woman you are dating who wants to be monogamous.
2. A 'miss' when you attempt monogamy but screw it up.
1. -How's your monogamiss doing since you gave up other women?
-All good. She likes having a monogamister.
2. I told Kenny I'd stop seeing other guys, but then I did tequila shots all night and ended up having a monogamiss. Think I should tell him? I'll never have another monogamiss...as long as I stop drinking tequila.