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1.
Fastcore is a derivative for of hardcore, started in the early to mid 80s by bands such as Koro, Urban Waste and Deep Wound. Fastcore is closely related to thrashcore and powerviolence.
I bought Koro's 700 Club EP and every song was about 30 seconds. It was one of the first fastcore albums.
by crustfan April 09, 2007
 
2.
Fastcore is a term for fast styles of hardcore (ie thrashcore, power violence, crustcore etc). As these genres can sometimes be difficult for people to tell apart, the term Fastcore can be applied to the lot, making the labelling of bands easier.
625 and Sound Pollution are some of the premier fastcore labels in the world
by ConcreteHorizon August 30, 2006
 
3.
Although a music type much like THRASH, the term THRASH is too closly related to METAL, THRASH METAL, and the like. Don't get me wrong all mentioned above rule!!! Fastcore is a more clean sounding, usually non grinding guitars, abrasivly fast drums (blast beats), with usually mid to higher pitched screamin vocals...?
fuck on the beach, charles bronson, cold world,....etc...
by steven March 24, 2005
 
4.
Dirty films played in fast forward, where the action becomes so fast that sexual arousal is intensified by thirty times.

Usually spectators climax before unzipping their pants.
"I went to see a fastcore movie and glued my pants to myself"

"Hey kid, wanna touch it?"
by Jedimintrick October 22, 2006