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Longman Dictionary of Contemporary English
creepy-crawly
noun
EXAMPLES FROM CORPUS
▪ Guillermo del Toro, who previously directed a creepy-crawly little movie called Cronos, can accomodate you with Mimic.
▪ Since when did metal creepy-crawlies get kitted out with stereo systems?
▪ Some kind of Gerald Durrell character, is he, going round the world collecting creepy-crawlies?
▪ Sylvia had started to hallucinate, seeing creepy-crawlies on her bed, and the houseman had to come and sort her out.
▪ You'd have known so well that when you turn over a stone all kinds of creepy-crawlies come clambering out.
Wiktionary
creepy-crawly

Etymology 1 n. Any small crawling animal such as a spider, insect or worm. Etymology 2

n. (context AU informal trademark erosion English) an automated suction pool cleaner.

WordNet
creepy-crawly
  1. adj. causing a sensation as of things crawling on your skin; "a creepy story"; "I had a creepy-crawly feeling" [syn: creepy]

  2. n. an animal that creeps or crawls (such as worms or spiders or insects)

Usage examples of "creepy-crawly".

But then he used it to clear the tunnel of the spider webs, so Jones had figured it was possible the brilliant and powerful Max Bhagat was a baby when it came to creepy-crawlies.

I regretted having yelled, but when it comes to creepy-crawlies I immediately lose my gonads, become all hoopskirts and fluster.

For what could be more horrific than the tiny inhabitants of the creepy-crawly world if our own microscopes were to suddenly inflate to the fearsome proportions of dinosaurs?

Diethyltoluamide—I just knew it as deet—was magical stuff that would keep the little mozzies and creepy-crawlies away from me.