Have you ever heard of a "slumpbuster"?
In sports parlance, and according to Urban Dictionary, a "slumpbuster" occurs when an athlete is in a slump and needs "an easy score to get [their] confidence back up and break the slump" usually by sleeping with someone with whom they normally wouldn't associate. To say it in better-than-provided terms, someone who is not the normal model or beauty queen that many athletes are seen with in public.
Sure, in this case it's definitely a negative term, but the concept is a solid one. Well, other than the sleeping around bit, that is.