The line comes from Dora the Explorer, the American children's animated series that first aired in 2000, and its Brazilian Portuguese dub Dora Aventureira. In each episode the fox Swiper tries to swipe an item, and Dora and her friends chant the warning to make him stop and return it. Brazilian viewers grew up hearing Raposo não pegue as a familiar call-and-response, and the short clip later circulated on soundboards and in short-form edits. It endures because the chant is instantly recognisable, playful, and easy to drop over any sneaky moment.