pop-up game show
A game show that "pops-up". They are often made as a cheap way to make money. Typical traits include: winning fuck all in prizes (typically £10,000 or under), going home with nothing if you lose and no competition (one contestant/team per programme). They tend to get cancelled very quickly. An example of a pop-up game show is BBC's The Wall.
Did you watch Gordon Ramsay's latest pop-up game show? It was rubbish!