Beformance

Someone who has rushed to the theater on opening weekend to see the latest flick. Then acts out, in annoying detail, all of the best highlights of a movie before you've actually seen it. Giving away the plot and virtually every good part of the movie... ruining it for you.

Did you see Michael giving a beformance of the new Planet Of The Apes movie? What an ass! Thanks for blowing it for me... loser!