Guest Star

The third person involved in a threesome with a couple. A sexual third wheel usually a stranger or acquaintance.

My girlfriend and I invited the hot chick from the airport to be our guest star Friday night and she was a total freak.

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Guest Star Whore

An actor, actress or some other form of entertainer who makes guest apperances on a several television shows during a period of time in which they do not have anything else going on in their career-this usually occurs when one's career has reached a dead end

That Victoria Justice just keeps popping up all over Nicelodeon's other TV shows-she's such a Guest Star Whore

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