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1.
Jcing is an abbreviated version of 'Just Chilling'
Guy1: What you up to today mate?
Guy2: Jcing
Guy1: Cool
by TruestOfLads September 08, 2011
 
2.
Abbreviated term for Jewel Crafting. Commonly used MMORPG's such as World of Warcraft.
JCing really compliments mining, so does blacksmithing.
by Damien256 May 28, 2008
 
3.
The abbreviated act of 'just chilling', pronounced 'jay-seeing'. Mainly heard around the Liverpool area and widely used in the younger generation.
Nothing much, JC'ing watching telly.
by Leedle93 November 18, 2010