A favorite of my own is the use of "the bee's knees". It means something is high in quality or is very very good. The rough origin is from bee farmers. Bee's carry the large amount of pollen on their knees, and of course , the more the better. This then became the saying, "this is the bee's knees!!" Or this is awesome! Another I like is "a dime-a-dozen". This is a very popular term from american movies, as a dime is 10 cents. The idiom explain the amount of something being so high, that it is rather worthless. For instance, a dime a dozen singer, means that at the moment, the market for a singer / entertainer is so flooded that you could get 12 (a dozen) of the from one dime (10 cents), which is very cheap when one looks at it as such!