Top Definition
A girl will put her macbook case on upside down as a sign of being dtf. The apple on the case will face the opposite direction of the apple that lights up so that the two look like they're 69-ing. Bitch be horny.
Guy: Dude, do you think she's in to me?
Friend: Yeah, man. She's got an upside down macbook case on her laptop. Totally dtf. Go mack, bro.
Guy: I think you mean mac!
*High-five*
by geniusbar_player October 25, 2011

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