the best thing since sliced bread

The best thing since sliced bread is a very common idiom that most everyone has heard of at least once in their life. When something is referred to being the best thing since sliced bread, they mean to say that this person or thing is extremely good, often much better than they really are. It refers to sliced bread being one of the most popular inventions in history, but really have bread pre-sliced isnt much better than regular loafs of bread, though some people see it as being superior.