Top Definition
when someones sexualality fluctuates from prefering guys one week, then prefering girls one week; a fluctuating version of bisexual
girl one, texting her friend: "OMG!!! Halle Berry is such a sexy beast!"

Girl two, responding: "I thought you were stright?"

Girl one: "not really"

Girl Two: "what do you mean"

Girl one: " what would that make me?"

Girl two: "um.....i guess a.....flucusexual"
by youfuckingsuckballs April 23, 2009

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