A rolling stone - Idioms by The Free Dictionary
a rolling stone
a rolling stone a person who does not settle in one place for long.
This expression comes from the proverb a rolling stone gathers no moss , meaning that a person who is always moving on will not accumulate wealth or status, or responsibilities or commitments.
a rolling ˈstone (gathers no ˈmoss) (saying) a person who moves from place to place, job to job, etc. and so does not have a lot of money, possessions or friends but is free from responsibilities