Slimes literally mean sticky materials or mucus. They first appeared in the novel “Slime” written by Joseph Payne Brennan and published through the 45th edition of 〈Weird Tales〉, the US magazine, in 1953. The slimes described in the novel are monsters that wander around the bottom of the ocean, and once a living creature appears nearby, they either expand or shrink their sticky body to surround and eat it. Since then, slimes have been depicted as a sticky lump that digests and absorbs all living creatures and lets out a rotten odor.