Wikipedia
ISheep
iSheep was originally a SanDisk marketing description of users of Apple's iPod music player instead of SanDisk's own Sansa player. The marketing term is borrowed by some in tech sites and forums as an insult to a person who is an Apple Inc. products fan. The term is often used to bash Apple fanboys who over-advocate or promote the 'Apple cult' in online discussions, those usually involve fanboy wars over popular smartphone brands or manufacturers.