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1.
A term that can be used to describe either a male or female sex machine. As with any beast of burden this individual has the ability to fuck or to get plowed for long durations or multiple times with multiple parties. Like an ox plowing a field this individual truely is an animal.
Ray " Wow that chic is a total fuck beast, she has fucked each and every guy at this party at one time or another during the night"
Tom "Yeah, no shit. She just fucked me for an hour then went off with your buddy Phil." "my dick is still fucking sore!"
by Nate11 October 18, 2007

Words related to fuck beast

beast fuck fucking slut whore
 
2.
Derogatory term for a partner used exclusively for sexual intercourse.
John has no respect for Martha, she is nothing more than a fuckbeast for him on lonely Saturday nights.
by tru@ December 15, 2004