It was originally invented by Dan Bergstein so that he could use it for Blogging twilight and people would know if he was being sarcastic or not. The general consensus is that the left hand is the sarcasm hand because the right hand is raised when under oath. It is now used on the internet (mainly Sparklife) by anyone who wants to be sarcastic on the internet. To use the sarcasm hand, type *raise sarcasm hand*
by TheGlassCat September 8, 2013