Top Definition
An explosion in the head as a result of working with Apple Macs. Or a build up in tension resulting in an outburst of furious anger, again after using Apple products.

It can be found in the I.T industry.

The "Heid" part is pronounced, "HEED"
He is off work today due to Mac Heid
by CombineFetish February 08, 2011
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