Term used in fantasy baseball. It is the act of picking up starting pitchers (and then dropping them for a new one) in an effort to win the strikeout and wins categories. Usually pitchers available on the waiver wire aren't very good, hence rotating through jobbers.
I'm down 3-1 in wins and 35-20 in strikeouts. Guess I'll have to do a serious jobber rotation the next few days.
for funemployed persons, a developed discriminatory attitude towards people with jobs
Me: Did you catch the latest episode of JDY (Judge David Young)?
Friend: No, I was at work.
Me: Me neither, because I woke up at 3pm and missed it.
Friend: F you.
Me: Whatever, person with a job. Oh look at me, I'm Jobby McJobberson, I work for a living. Get out of here.
Friend: Dude, you're jobcist.