Language change is an on-going process, including the constant emergence of newly coined words, the so-called neologisms.
Cambridge Dictionaries Online maintains a blog where you can find words and expressions that have just started to be used in English. On the website you can read their definition and example sentences, and you can also express your opinion by rating them.
Would you like to know what a Facebook facelift, a site scraper or a gastrocrat means? Visit the blog About Words and find the latest new expressions used by native speakers.