1 definition by wellisntthisfunny

MSS (Main Squeeze Security), n.

The security that comes with being someone's bottom bitch.

It provides one with the comfort of knowing that, even though your partner is out fucking other people, they'll always come home to you.

Also known as a Social Security Number for the polyamorous.
Person 1: "How do I know you aint just gonna up and leave me for some hoe?"

Person 2: "Relax girl, you got MSS"
by wellisntthisfunny October 24, 2010
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