Vaping is an alternative to cigarettes (or "cancer sticks" as some have called them.) It offers the simulation of smoking by vaporizing liquids, known as "juices."
"An electronic cigarette (or e-cigarette), electronic vaping device, personal vaporizer (PV), or electronic nicotine delivery system (ENDS) (not to be confused with smokeless cigarettes) is a battery-powered device which simulates tobacco smoking. It generally uses a heating element that vaporizes a liquid solution. Some solutions contain a mixture of nicotine and flavourings, while others release a flavoured vapor without nicotine."