Someone who talks about someone or something like they know all about it, but in reality they're either really new to it, or they want to make themselves look like a badass because the people they're talking to are clueless on the situation.
Brandon: "Meagan told me she was head walking and stage diving for that band the other night man!"
John: "Bullshit, that bitch is such a Jobber."
John: "Bullshit, that bitch is such a Jobber."
by DontJobOnMe December 28, 2011