From Longman Dictionary of Contemporary Englishidlerid‧ler /ˈaɪdlə $ -ər/ noun [countable] old-fashioned LAZYsomeone who is lazy and does not work
Examples from the Corpus
idler• I stood still: an idler at an enormous accident.• Thanks to his curriculum, Brown is a paradise for airheads and idlers.• Nor were they inconsequential gossip and rumor being whispered by small-town idlers on local street corners. 