As sweet as a nut

Posted by James Briggs April 01, 2011 at 09:34In reply to As sweet as a nut posted by Tony Noble on March 31, 2011 at 11:22:

I was told many years ago by my now deceased father that the phrase "As sweet as a nut" originated from a very reliable and 'sweet' running motorcycle called a 'Newcastle Upon Tyne' or NUT, hence anything that ran well was was known to be "As sweet as a NUT". If this is the genuine origin of the expression, I have no idea! But if nothing else it gives "Food for thought".

I think that the expression is much older than motorcycles!
Here's one of our Archive entries on the subject.
www.phrases.org.uk bulletin_board 18 messages 494.html