Dawdler. Layabout. Shit-heel. Loser. For as long as mankind has had to work for a living, which is to say ever since the expulsion of Adam and Eve from the Garden of Eden, people who work have disparaged those who prefer not to. Mark Kingwell's introductory essay offers a playful defence of the idler as homo superior, while Joshua Glenn's glossary playfully explores the etymology and history of hundreds of idler-specific terms and phrases, while offering both a corrective to popular misconceptions about idling and a foundation for a new mode of thinking about working and not working. The Idler's Glossary is destined to become The Devil's Dictionary for the idling classes, necessary reading for any and all who wish to introduce more truly free time into their daily lives.