Quite an interesting dictionary to check out new expressions, idioms and the like. An interesting feature of the dictionary is that if you look up a common verb such as know and click on idioms a comprehensive interactive list of idioms and collocations is displayed.


http://idioms.thefreedictionary.com/know
http://idioms.thefreedictionary.com/on+its+last+legs
http://idioms.thefreedictionary.com/lost+for+words