Parents are royally freaked out by this prank, especially the younger their kids are. It involves crafting a very real-looking fake tattoo out (that doesn’t wash off easily). The pranksters print a design (the larger, the better), then spray the paper heavily with perfume, dunk it in water for a few minutes, then spray again, and apply. The more traditional the parents are, the “better” the reaction.
Source : https://www.distractify.com/p/tiktok-pranks-on-parents