A result of using any iPod (with a metal back) or iPhone without a case, characterized by ungodly amounts of fine scratches on the back of said device.
John decided to blow all his money on AppleCare rather than get a case for his iPhone. Now because he went commando, his phone has a nasty case of iScratch.

Is that iScratch on your iPod, or did you just try to chisel your name on it with a screwdriver?
by Lord Wickerbottom XVII Jr. October 26, 2009
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