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1.
Adjective describing those who purchase Apple products in order to fit in with the "cool" crowd. The Mactentious often bring their Macbooks and iPads in coffee shops pretending to read various blogs and classic literature. The Mactentious will argue without reason that everyone should own a Mac due to it's superiority, ignoring all logical arguments. Mactentious people will often be seen wearing scarves, fedoras, and only drink fair trade coffee.
Johnny: How do I view the properties for this folder? Your mouse has no right click.

Jimmy: Right click? Pfftt. Well, you COULD change the settings to activate a right click. But the Mac is perfect as it is.

Johnny: Your so Mactentious.
by Musehobo October 25, 2010