Job Jumper

Someone who jumps from job to job, kind of like a drifter but someone who doesn't want to be cooped up in one place for too long. Usually this annoys the employers because it implies that someone isn't going to be putting in a lot to the company they're working for or they're not committing.

Joe is a Job Jumper. He has had 20 different jobs in the past 20 years, somehow he can bullshit a resume and make himself seem interested/employable. More power to him.