I know the last thing we all need is another dictionary website, However this site I just stumbled across called [Wordnik](http://www.wordnik.com/) seems pretty cool as it allows you to search for words and phrases. Had a result for [_"takes one to know one"_](http://www.wordnik.com/words/takes%20one%20to%20know%20one).  Clean, minimal design, and quick-loading.