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1.
A genre of music created in central Ontario, in between the years 2003-2004. Music studies have proved in the history of time that harmonicore was a mixture of the musical instrument 'harmonica' and 'metalcore' a genre of music consisting of several breakdowns , repetition and screaming.

Huge fan base in eastern Europe, Holland, and South America. Some may say that it blesses unborn fettuses with gracious words and luck.
Tight Pants - OmGaWdZ h4V y3W h3rD d4t K3Wl b4nD 0n m-EYE-Sp4Ce

Black hair - OMG HARMONICORE IS SO GOOD, HIS BIRDS ARE GRACE.

Tight pants - n0.
by Michael Catsburg January 10, 2007
 
2.
a genra of music mutch like hardcore but incorperated into it is a harmonicaoftne in the breakdowns
dude i just found this sick assed harmonicore band called taridaktul
by tyler whissell September 09, 2006