Vaping is when you use a handheld electronic device to breathe a mist (“vapor”) into your lungs. An e-cigarette, vape pen or other electronic nicotine delivery system (ENDS) heats a liquid of nicotine, flavoring, propylene glycol and other additives into an aerosol that you inhale through a mouthpiece. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.