In Reply to: With knobs on posted by Daniel Driscoll on June 22, 2009 at 08:22:
: Wondering if you have heard explanation re 'With knobs on': from my experience I conclude that the saying derives from the era when the automobile first became available, most likely in Britain and perhaps more precisely in University Towns like Oxford and Cambridge. The earliest 'cars' would have had no 'knobs' - but soon there was a need for such as lights, windshield wipers, choke, etc. 'Knobs' made their appearance, and the popular lingo applied it to almost anything - "You can say that again, with knobs on", etc.
If you go to http://www.phrases.org.uk/bulletin_board/57/messages/979.html you'll see what was posted in 2008 by VSD