Top Definition
Noun, Adjective

1. a person that may have sex with whatever offers when in the mood, may include inanimate objects as well

2. someone not considered a bisexual but will have sex with anyone of either gender without hesitation
Steve was not a bisexual, he was very much a straight man, but when he was horny it was fair game to anyone who offered but after he peaked it was back to being a straight man, which made him and Opportunistic Fucker
by Idregger April 09, 2011

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