For the anonymous poster who asked, and anyone else new to the FOOBiverse, Lynn made up the term. She also assigned the definition of "slut" to the words "gig" and "roadside".
Someone (not me) emailed to ask if these terms really were common teen slang. Lynn replied, through a staffer, that they were not; she didn't want to use current slang that would be outdated eventually. So instead she uses terms that sound stupid NOW. Whatever.
And we call the strip FOOB, and its odd conventions the FOOBiverse because someone (not me) on the late Fametracker forums noticed the similarity to the acronym FBOFW. Easier to type FOOB.