A viral marketing tactic where misdirection is key. Corporations often simulate user-generated content to manufacture a "must see" phenomenon. Once circulated extensively, the company will reveal itself as the source in an attempt to re-examine the purpose of the video. Often meant to blur the line between art and commerce.
Phil: Holy shit, did you see that video where those guys use cell phones to pop their popcorn???
Ad man:Yes son, that's the just the latest in murketing. Now go visit xxxxxx's website to reward them for exploiting your stupidity.
A state of utter confusion that can be brought about in various ways, e.g. immediately after waking up, or hearing an unfamiliar inside joke. Some people are more prone to being murred out than others.
Matthew: I tried to go to class today, but I forgot that today is Labor Day. I spent 20 minutes sitting in the lecture hall waiting for the professor to show up.