A vagabond is someone who moves around a lot. Picture Boxcar Willie, bandana on a stick thrown over his shoulder, going wherever the breeze takes him.
Vagabond can also be an adjective, a nomadic tribe is a vagabond one, or the person who moved eight times in two years is living a vagabond life. It's from the Latin word vagabundus (from vagari, "wander") which means "inclined to wander." So — if you were born a ramblin' man, you might just be a vagabond.