The grey area in between taking the plunge into a committed relationship and platonic friendship. Often due to indecision on the part of one or more parties involved.

Symptoms might include, holding hands, non-committal sex, spending an inordinate amount of time together, flirting on text messages.
"Sam and Jane have been having this non-relationship for months now, they need to decide whether or not they are going out or not."
by atreidai July 25, 2005
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A situation in which two people decide that they want to be sexually exclusive without taking on the title of "boyfriend" & "girlfriend" or having any type of official commitment. Often following a period of transition between casual dating and an established romantic relationship.
"John has been with that girl for a few years now. Is he ever going to start introducing her as his girlfriend?"
"He's afraid of commitment and happy being in a monogamous non-relationship. I don't think they are going to put a title on it any time soon."
by Bravs53 March 30, 2013
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the relationship status of a couple who break up because they don't want to be long-distance, yet still talk every day and both plan to "see how things turn out"
The girl was hitting on Dino, but he was in a committed non-relationship with Jessica, and would never cheat on her.
by malberry September 1, 2012
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1. an association with one who engages in normal boyfriend-like behaviors at random and sporadic intervals; but without any regular consistency.

2. the condition or infection of a noxious chemical or other substance, causing lust, love, total confusion, and an increased proclivity towards drunk texting.

3. half-dating a guy you can’t get over because his erratic behavior makes you act like a total fucking lunatic.

4. dating mr. yuck.
I am going absolutely crazy trying to figure out what is going on in my Toxic Non-Relationship.
by Dating Mr. Yuck June 23, 2010
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People tend to think of relationships as binary. You are either in a committed relationship or you are single. A non-binary relationship is where you are fucking someone, but also free to fuck other people - like friends with benefits or the dreaded "it's complicated" relationship status.
Him: so who is this guy you are seeing.
Me: Well I don't know if I would call it all that -we are free to be with other people too - its a non-binary relationship.
by Siouxsie Supertramp May 1, 2021
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