You searched for: “vaperer”
vaperer (s) (noun), vaperers (pl)
Someone who uses a battery-powered device that simulates tobacco smoke: "Since the mist that is produced by e-cigarettes is supposed to contain only nicotine and none of the other harmful chemicals (such as, tars), vaperers are being misled into believing that this activity has an advantage over regular smokers because it is cleaner."
"One medical dictionary says: 'Nicotine is one of the most toxic and addictive of all poisons.' "