Question - What is "juuling”?
Answer - The cited reference reports: “JUUL (pronounced “jewel”) is a brand of e-cigarette made by JUUL Labs Inc. JUUL has grown quickly in popularity since introduction to the market in 2015, fueled by a serious following among youth and young adults. JUUL is a sleek, small e-cigarette that resembles a flash drive. Unlike other types of e-cigarettes, JUUL does not look like a traditional cigarette and thus may not be immediately identifiable as a vaping device. Due to their size, JUUL devices are discrete and can be easily concealed in a fist or a pocket.
JUUL operates by heating a “pod” of e-liquid containing nicotine, flavorings and other substances. When heated, the e-liquid creates an aerosol which is inhaled by the user.
JUUL has spawned its own terminology: use of these devices is called “juuling.” JUUL is highly addictive. The concentration of nicotine in JUUL is more than double the concentration found in other e-cigarettes. This high concentration is a serious concern for youth, who are already uniquely susceptible to nicotine addiction. The addictive potential is so high that the US Surgeon General has declared that youth use of nicotine in any form is unsafe” (https://www.aap.org/en-us/Documents/AAP-JUUL-Factsheet.pdf; accessed May 2018)