The term "Jello skin" was coined by Ava Lee or AVA, a skincare guru who goes by @glowwithava on TikTok. Jello skin is firm, dewy, and wrinkle-free, but while Jell-O may be jiggly, you want your skin to be more of a firm Jell-O; AVA's skincare specialist says that if your skin "bounces" back when poked, rather than jiggling, you have healthy levels of collagen.