Top Definition
Of unstable sexual orientation. Usually a botanical term used to describe a plant that can be either male or female, but can be used to describe a persons sexual instability. Used to describe people who prefer both men and/or women, but change their mind on a daily basis.

Not often used by everyday people, only by those who crave attention from their peers and want to appear clever.
I dunno, yesterday you fancied him, now its her, you know what you are, you're polygamadioecious, thats what.
by missadventure November 02, 2006
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