The catch word is the words and expressions which in some time,some region appears is widely popular and uses frequently.It had the obvious historical characteristics - - social environment change to bring the new words and expressions production,and caused it to be popular.The catch word appearance is long-standing,but near two year so high density high-frequency's appearance is really rare.2009 to 2010 this period of time,the catch word already had just like become a social life part,then why had given the catch word broader existing space recently?This article the background which and the social psychology aspect will produce from it carries on the analysis
希望能帮上忙!（本人师范外语系）