Vaping Equals Is Second Hand Vape Smoke Harmful Secondhand smoke and secondhand aerosol Does Vaping Smell? and How to Tell if Someone Is Vaping Ultra Liquid Labs Critical Appraisal of Exposure Studies of E Cigarette Does Vaping Smell? Does It Leave A Stink? Vaping refers to the use of an electronic cigarette, or other vaping device, to breathe in an aerosol, often containing nicotine, flavouring and other chemicals. Unlike cigarette smoking, vaping doesn't burn tobacco.