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Someone who will cheat on you with anyone; polyamorous meaning not accepting of the terms of monogamy, and pansexual meaning attracted to individuals across the gender spectrum.
"Jane and I have been seeing each other for a couple of weeks, but last night I saw her macking on Cindy!"
"I told you dude, she's a polyamorous pansexual, you should have known that would happen."
by cid gene phlo January 22, 2013