1) Aimless sort 2) Dawdler 3) Drone 4) Drugstore cowboy 5) Laggard 6) Lagger 7) Lingerer 8) Loafer 9) One definitely not on the run 10) One hanging around 11) One just hanging around 12) One just hanging out 13) One lingering aimlessly 14) One who hangs around 15) One who hates to act 16) One who keeps hanging around 1) Idler 2) Laggard 3) Lingerer 
• (n.) An idle vagrant; a tramp. • (n.) One who loiters; an idler.
Loi'ter·er noun 1. One who loiters; an idler. 2. An idle vagrant; a tramp. [ Obsolete] Bp. Sanderson. 
[n] - someone who lingers aimlessly in or about a place
lingerer noun someone who lingers aimlessly in or about a place