Top Definition
When something seems like a great, great thing, then it's possible that it's worthy of the phrase "rock hardcore." To rock hardcore, it must rock more than the average thing. Like, if Jesus were to walk up to me and give me five hundred bucks, that would "fuckin' rock hardcore." It can be applied to any noun, except if that noun embodies something that does not rock hardcore.

However, you can also use this term as a verb, changing the word "rock" as it needs to be changed. This phrase can replace phrases like "own," "pwn," or, "kerpwn," and it can also emphasize victory in a physical fight.
To express approval: "That idea rocks hardcore!"

To admit to the greatness of a person: "When Jesus gave me those five hundred bucks, I decided then that he rocked hardcore."

To annihilate someone (usually in a video game): "I just rocked you hardcore."

To kick the shit out of someone or something: "I just rocked his face hardcore!!"
by Ruloi April 04, 2004

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