creepy-crawly adjective 1noun 2forms 3 adjective1 •Unpleasant, repulsive.[…] and slimy, creepy-crawly dungeons with chains for your hands and feet; […] — 1903 noun2 •(informal) Any small crawling animal such as a spider, insect or worm that is unpleasant.Mattresses were either spring or made of old straw, and sometimes contained little creepy-crawlies. — 1919 •(Australia, informal) An automated suction pool cleaner. formscreepy-crawlies · more creepy-crawly · most creepy-crawly