"Illegal copy" is "불펌"(pul-pŏm) in Korean.
Illegal copying from the social medias without any permit from the owner of the thing. 불펌 is, 불법 (illegal/Bul Beop) + 펌 it (copy). 펌 bring the noun. 불펌 금지 (Bul Poeom gum ji) is illegal copy prohibited.