While the incredibly catchy “slugging” term has only been in the beauty sphere for a few years, thanks to the K-beauty community and various skincare subreddits, the concept of using Vaseline

to seal in moisture in the skin isn’t anything new. After all, Vaseline is an old-school product that can be found in almost any memaw’s medicine cabinet. It has a variety of uses, from healing burns and scrapes, to treating diaper rash, preventing chafing, and moisturizing dry skin. Marilyn Monroe swore by Vaseline in order to keep it soft and glowy (she reportedly applied it every morning before going into a three-hour bath).

“It was recently given a name and made popular by the Korean skincare world, however growing up with two Black grandmothers I was "slugging" far before it was popular,” explains Tiffany L. Clay, MD, FAAD, a board-certified dermatologist based in Atlanta. “I remember my grandmother teaching me when I was very young to apply ointment to my body after I bathed to keep me moisturized all day.”