Term of mild abuse describing recreational runners. Normally invoked by more experienced and accomplished athletes.
I watched the New York Marathon on TV last week and after the first couple of hundred went by it was wall to wall hobbyjoggers.
If you are not:
(a) A professional athlete making his living of sponsorship, appearance, and/or prize money;
(b) A D1 athlete receiving full/partial sponsorship money for competing;
(c) A coach of (a) or (b) for pay...
you ARE a "hobby jogger" and you are not any better than any others out there. The only people I see using such a term are wannabe non-elites with ego/attitude issues. I have never heard of ANY true professional/elite athlete using such as term.