Abbreviation of "Hardcore," more often than not referring to the music, scene, and people that are associated with it. In large part, pup-punk scenes and hardcore scenes coincide, but not without issues.
Generally, hXc bands at pop punk shows attract hXc kids, which hardly ever ends well, usually because of the lack of respect for the venue's rules by the hXc kids.
In large part, hXc kids are wannabe "tough guys" who pick fights in groups and carry weapons around at all times.
That's all modern-day hardcore has amounted to; gang mentality. It's not about the music or togetherness anymore. It's about picking fights and seeing who's toughest and who can be the biggest hardass.
Most hXc kids are quite generic and almost always have a look consisting of a shaved head/short hair, a band tee, and camo shorts.
Any hXc kid will deny these claims and probably say that anyone who makes them has no idea what they're talking about.
hXc kid: Check out this little emo fag. Go run home so you can sit in a dark corner and cry.
Scene/Emo/Some other vague generalization kid: Dude, you're generic as shit. You might as well be calling yourself a nazi, hardcore faggot.
hXc kid: This must be your first show, ebcause you clearly don't know what you're talking about, faggot. Shut your mouth before i bust out my knucks and break your teeth.
Scene/Emo/Some other vague generalization kid: Whatever, go smoke some more cigs even though you say you're sXe, douche.