rolling stone

noun

Etymology: From the proverb a rolling stone gathers no moss.

1. A person who moves around a lot and never settles down; a vagrant.

   “Before that they had been a good deal on the move, trekking about after the white man, who was one of those rolling stones that keep going round after a soft job.”

   “I'm sorry; I'm a bit of a rolling stone, I suppose. When Darrish came back to Netherhempsfield my job was done there. I felt uncommonly restless.”

2. A womanizer.

   “Papa was a rolling stone Wherever he laid his hat was his home And when he died, all he left us was a loan”

3. A geological phenomenon where rocks move and inscribe long tracks along a smooth valley floor without animal or human intervention.
4. A meteoroid.