A Matt Damon

A Matt Damon is when one of your friends either does or says something stupid this is a adopted term from the film Team America World Police in the film Matt Damon can only say his name and is shown in the film as a retard. It can be used if a friend doesnt understand a joke, says something very stupid, does something very stupid or if he is generally not very clever

I can't believe you did that' my other friend 'what did he do' 'he pulled a matt damon