Top Definition
A person that is your roommate but not your friend or in a romantic relationship with you. They can either be hated or just be around to help make rent cheaper. Simply you only have the relationship of being roommates.
"Samantha and I are in a roommatetionship."

"I don't hate Lenny, we are in a roommatetionship."
by Mollz12 January 12, 2009
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