Top Definition
the abbreviation for Jesus Christ of Nazareth. often used to display distate for someone annoying or your ridiculous art teacher.
him: Ms. Gam just gave me a D on this oil pastel because I didn't blend the yellow and red together.

me: ARGH! JCON!
by Klutzextract September 11, 2009
1 more definition
When one nigga tries to make another nigga flinch by faking him out with a pose of intimidation
"Yo I just J-conned the shit out of ogi"-Zach
"What the fuck is a J-con?"-Mac
by tonnce January 20, 2009

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