J4fmean? Here you find
Just for fun
A reference from the Something Awful forums, j4g stands for 'joined for guild'. It refers to someone who has joined the Something Awful forums for access to their guilds in various games, and not for their community culture.
lamer way of spelling jihad wrong with leetspeak.
Just for jokes
Just For Kicks. Doing something for the rush you get from it.
A j4ker (pronounced "jacker") is someone that uses "jk" or any other abbriviation in txting, comments, email, youtube, pretty much fucking anywhere.abriviation for j4ker: jkr (only for you j4kers out there!)