Short for "hard-kore", which is a deliberate misspelling of "hard-core", because only cool people would change a "c" to a "k".

Often sarcastically used to insult or describe someone who thinks they're rebellious, when they are, in fact, not.
Guy #1: Yo, I went to a party on the weekend and drank lots of beer, G-dog.
Guy #2: Woah. You're pretty HK.
by Bizzle May 13, 2004
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Who Cares, or HFK for Who F—ing Cares
Statement: "Whooaaaa, you hear Kylie Jenner is prego?!"
Reply: "HK amiga" or "HFK yo"
by Bonafix November 6, 2017
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HK stands for Higher Koncentration. It is a marijuana reference which was spray painted around the Waldo and Brookside areas of Kansas City in the late 1990s.
This KB has taken me to an HK
by raidn September 11, 2008
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"who cares?"
"whipidedoda"
"so what"
"I am the greatest of everything"

other: "HK!"
by JIMMY P. February 18, 2005
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A man who's considered to be a shemale.
"H" can be anything and "K" is kojja which means shemale in India.
Person 1: hey HK

Person 2: what does that mean?
Person 3: Highway Kojja
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HK is the initials to the legendary Moderator at Game-Revolution HolyKnight
HK is uber l337
by HolyKnightt December 13, 2003
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