re: What do you define as job hopper?

In engineering, I usually pass on anyone that jumps from job to job every 2 year especially in their first 10 years of their career. More times than not that person is chasing the dollar and hasn't picked up the necessary skills to be a good designer. They may be a good paper pusher aka "Project Manager".

I have hired a couple because we were in a bind and basically had to start from scratch because they basically didn't learn anything at their previous firms.

I understand in today's age why some are doing it to maximize their income.