"Dimebag" Darrell Abbott, the famed guitarist for Pantera and Damageplan. Most dimefags became which after his death, though many claim they have been die hard fans their entire lives.
1. Buying a Dimebag signature guitar, regardless of it's playability or condition, followed by:
2. Horrible guitar playing, usually sloppy Pantera covers.
3. Long nasty hair(colored goatee optional). This may take some time, which is why this is the most common sign used when determining how long they have been afflicted with dime fever, and thus calculating the severity of their condition.
Guy #2 - "Wtf? What is he, a Dimefag?"