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Adjective. Used to describe people who needlessly wear sunglasses indoors and carry backpacks everywhere they go, like the supermarket or a restaurant.
"I'm carrying my backpack into the restaurant. I'm going mattstyle."

"Hey, would you take your sunglasses off? You're not driving on the dizogg anymore. It's bad enough going to Sprawlmart, much less with someone who insists on going mattstyle.
by Ted Isog May 02, 2005
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