is a specific kind of: bum, do-nothing, idler, layabout, loafer.

derivation: moon about, moon around, mope | mope, mope around | dally, dawdle | footle, hang around, lallygag, linger, loaf, loiter, lollygag, lounge, lurk, mess about, mill about, mill around, tarry | dilly-dally, dillydally, drag one's feet, drag one's heels, procrastinate, shillyshally, stall.