Following the trend of prefixing a genre name with J- to signify Japanese origin (eg J-pop, J-rock etc.), J-core is an abbreviated term for Japanese hardcore dance music.
Though many only associate this term with artists such as DJ Sharpnel who are well known for their very Japanese-flavoured anime/film sampling hardcore, the umbrella term can be used to describe many kinds of Japanese-flavoured hardcore, such as happy hardcore, freeform, speedcore and terrorcore.
This term can sometimes be used to describe hardcore punk music from Japan as well as just hardcore electronic/dance music.
Though many only associate this term with artists such as DJ Sharpnel who are well known for their very Japanese-flavoured anime/film sampling hardcore, the umbrella term can be used to describe many kinds of Japanese-flavoured hardcore, such as happy hardcore, freeform, speedcore and terrorcore.
This term can sometimes be used to describe hardcore punk music from Japan as well as just hardcore electronic/dance music.
Notable J-core artists include DJ Shimamura, Buzzmasta, M-Project, DJ Chucky, DJ Technorch, DJ Sharpnel and REDALiCE.
by JAKAZiD December 15, 2008
Get the j-coremug. 
The act of playing HALO 3 by yelling obscence, yet creative insults at the other players, including the players on your own team, while geekily wearing the included headset. Such insults include, but are not limited to the following: "Stop being such a vagina, you douche.", "Yo douchebag, here eat some ball-sack.", "Fuck you, you pusker, stop feeding me dick."
by Toni Ann November 25, 2007
Get the suede jmug. by dulce.xx March 25, 2021
Get the j colemug. by Cowsgopoop October 1, 2017
Get the Tyler Jmug. A person with a small dick that is inserted in a arab mans asshole and and asian man licks the shit off
by klok1012 November 2, 2008
Get the [J Gat]mug.