A jobler is somebody who does small jobs. This means, I think, that one could jobble. One could spend Saturday afternoon jobbling, and not know where the time went. Now, if you'll excuse me, I have a million and one things to avoid doing.
The Horologicon is a book of the strangest and most beautiful words in the English language arranged by the hour of the day when you will really need them. Words for breakfast, for commuting, for working, for dining, for drinking and for getting lost on the way home. It runs from uhtceare (sadness before dawn) to curtain lecture (a telling off given by your spouse in bed). It's out on November the first, but you can already order it from these lovely people: