a relationship that revolves completely around sex, so much so that the people are not even considered to be "in a relationship" but simply just hooking up. it is different from a one night stand in that it lasts longer than one night and at least one person feels an emotional bond that most likely isn't even there.
Girl #1: Joe and Kate really need to stop their sex-lationship and either start dating or stop fucking.
Girl #2: Seriously.
by notgiven123456789 June 19, 2008
A relationship based solely on sex, casual hooking up, and booty calls with no strings attached or seriousness.
You are so in a sexlationship with Kenny. All you do with him is have sex with no conversation, hanging out, or dates.
by BlueEyedIrishLassie July 20, 2011

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