Muggle, a term from the Harry Potter book series by J. K. Rowling, refers to a person who lacks any sort of magical ability and was not born into the magical world of Jane Public. The terms "Muggle" and "Jane Public" are sometimes used in a pejorative manner. Since "Muggle" refers to a person who is a member of the non-magical Jane Public community. You Idiot. Moron. Senseless Dummy. Poof. Bye.
p.s. I saw the doc film, SMASH HIS CAMERA. It was really great. Inspiring story about a passionate photographer and an honest putz (quote from one of his subjects, "People like this are boils on the ass of humanity")
http://blogs.suntimes.com/ebert/2010/01/smash_his_camera_but_not_immed.html