This word must always be said in capital as it emphasizes how hard the word ROCKS
HARDCORE is saying pretty much your comment on how extreme something is. HARDCORE is the limit, it is the core of cool things! It is the mother of things! It is being surrounded by wanna be HARDCORE things! Such as deoderant! Deoderant isn't as HARDCORE as cones. No way.
Cones are in the core of coolness. You can't get better than cones, think of a planet. A planet like Earth only this planet represents the coolest of the cool! In the middle is the HARDCORE things whilst wannabees are wrapped around it desperately begging for acceptance. Like I said, for instance: deoderant. Deoderants cool but not as HARDCORE as cones. It's in the core, it is hot, you cannot get as hot as a HARDCORE cone! I'm repeating myself here but who cares?! Repeating is HARDCORE!
-EXTREMELY HOT HARDCORE ROCKNG CHICK!