A sin tax is a tax beyond normal sales tax on certain items that are thought to be harmful. The most common example is the tax on tobacco. The tax on gasoline and inefficient/polluting motor vehicles is another example. Sin taxes exist to drive up the cost of and therefore reduce the use of harmful products such as gasoline and tobacco.
The new sin tax on tobacco is forcing some people to quit.
by blenheimears May 14, 2009