1 definition by notyourbusiness

1. a "kid" even if only at heart, who stands up for something they believe in.
2. someone who enjoys hardcore music
3. someone who is obsessed with something

not necessarily "punk" or "emo"
1. that kid is a hardcore vegan
2. that kid sure loves hardcore music. he is a hardcore kid
3. that gamer is such a hardcore kid
by notyourbusiness January 14, 2006
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