Tobacco rolled up in paper with a filter. They are smoked in order to obtain the nicotine in the tobacco. Some people are social smokers (1-3 a day) and some are heavy smokers (a pack a day). Some smoke even more.
Cigarettes were cool and acceptable in the 1920s-1960s but today they are considered uncool. They are responsible for many deadly diseases like lung cancer and strokes. In many parts of North America you can only smoke outside, in your home or in certain hotel rooms. People look like idiots when they try to hold them.
For those earlier posters who try to defend smoking: You're not fooling anyone. We are trying to help you realize you are wasting your money on something that will kill you. Don't ask for sympathy when you get lung cancer from me. Smoking is the most disgusting habit in the face of the earth and if you smoke, you're inferior.
Look at all the people with cigarettes outside the office building. They are so uncool.