From the Latin for "wander," vagrant should be used as a romantic adjective for "undecided"; "vague," a close etymological relative, should remain a pejorative. If a synonym for "bum" is required, use "vagabond" instead, please. See: MIND-WANDERING.
a wanderer who has no established residence or visible means of support
a potential criminal, a person open to any opportunity, a bum is a bum, not a millionaire with nothing to do
A wanderer that shows up in unexpected places. Several species of hummingbirds native to the southwestern United States appear as vagrants in the eastern U.S., especially in late fall and early winter.