How many times have you sent cheeky SMSes to your friends only to discover that your sarcasm didn’t get through? Lets face it – they’re probably a bit too dull to understand it. So, the next time you want to send them a sarcastic quote, there is a whole new symbol which can be used to drive in the point.
Michigan based company, SarcMark.inc has introduced SarcMark, which is a small circle enclosing a period to denote sarcastic comments. This is available in two formats. The font version will be visible only if the msg recipient has downloaded SarcMark. For others, there is the image version which will be visible to all. Hit Ctrl + period to insert the SarcMark if your using the image version, else hit Windows + period key or Command key + period key.
But of course, all this comes for a price. You will have to shell out $1.99 for downloading SarcMark.
Too much to pay for a symbol, some people might say and for a symbol that has little scope for reuse. But yes, it helps you in driving in the nail 
But if you are the types who say, “Hey…Sarcasm is the privilege of the witty”, then you might as well skip this one
