A person that listens to fake, and horrible music that takes no musical talent what so ever. Thinks that he/she can fight...but really can't at all. Usually gets the fuck beat out of them by metalheads who see them "hardcore dancing" in places that are meant for MOSHPITS.
hardcore kid: DUDE I AM SO COOL WACH ME PULL THESE AWESOME WINDMEELS AND THEN RANDOMLY SWING MY ARMS LIKE A MONKEY.

Metalhead: No, fuck you. *knocks em' the fuck down, then continues to mosh on their face.*
by Metal Up Your Ass December 9, 2006
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Hardcore kids are usually ex emo or scene kids who wear tight girl pants and have their hair cover their eye. They listend to really lame music that isnt real hardcore its more like metal core (real hardcore is the punk music scene in 80s america). They tend to hardcore dance for no reason even if they arnt in a show they start moving thier arms around. They take like 20 million pictures and post them on myspace.Yet their are a few i guess you can say real hardcore kids who wear like shorts and stuff and they always hated emo.
hxc kid: take down is the best
before he was hardcore kid: fall out boy is so cool
by postpunk is great September 30, 2005
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A 14-22 yr old who goes to strictly concerts with hardcore bands. They take turns punching and kicking air during the songs. They think they're badass but knock one down and they'll start to cry.
That harcore kid punched me. I'm gonna kick his pussyass.
by concatenation March 23, 2004
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A "Hardcore Kid" can be described as someone (usually around the age of 17) who stands around at some local community hall and listens to shitty bands.

Band names include, but are not limited to:

A Hero A Fake
Protest the Hero
A New Hero
A Heroes Welcome
aboycalledhero

Visual Description:

- Girl Jeans (usually rolled up to the knee, giving the look of capris)
- V Neck shirts
- Head-band or bandanna
- Converse Shoes / Vans Slip-On Shoes
- Long (girlish) hair
£nigMa

(it was a good example)

Hardcore Kid 1 Wearing a Polo : Holy shit that was fucking crazy did you hear that drummers double bass...
Hardcore Kid 2 wearing band T : Fuck yes...
Hardcore Kid 3 wearing no shirt : Check out me throwing it down with these sick moves.. * pulls a chicken wing into a Pick up pennies then throws in a double front*...
Hardcore Kid 2 : DAMMMMN
Hardcore Kid 1 Wearing a polo : I'm still a hardcore kid and we are hardcore kids because I'm wearing a polo!
by £ME August 4, 2009
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an angry SOB who will act tough but is, on the inside, an emo kid in denial. Does ridiculous things like round houses and other such things and calls it dancing. hate ska kids because they are happy.
That hardcore kid loves to mess with those ska kids, I can't wait until they make him cry.
by Roadie August 17, 2004
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a hardcore kid (hXc kid) is some one who follows fashion. they probably went from emo, to scene, to hardcore. they listen to awful music and dance in such a way they usually end up in hospital (two-stepping & spin kicking).
they think it's cool to stand around with alot of hardcore kids and make fun of anyone who isn't wearing a bring me the horizon tee or isn't wearing tight pants.
omgzzz. why fxck are you wearing a modest mouse tee? that's too indie for me!.
now where the fuck are my hair extensions? people might think i'm uncool if i'm seen without them! im such a hardcore kid!
and NOT emo or scene.
by vicky allanson September 11, 2005
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