When holding a camera at arm's length in order to take an oh-so-artistic 'Myspace Picture
', the Myspace Arm is the area of your arm that gets in the way, and forms a fuzzy, blurred splash on one side of the image.
Many a 'hawt pikturre' has been jaded by the Myspace Arm.
"That picture of Chris and Lauren at the Acer gig would have been pretty cool were it not for the Myspace Arm in the bottom left."
"Dude, that's baaad."