Top Definition
The heat rash occurring on the ventral portion of the thigh after Mac Book Pro users spend more than 15 minutes seated with the computer on their lap.
When John's friend noted the skin discoloration caused the by the overheated Mac Book Pro, John supplied the diagnosis: "Dermatitis MacBookensis. Soon as I finish this paragraph, we can turn it over and make quesadillas."
by Pancho Doll March 03, 2007

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