Definition of "creepy"

creepy

/ˈkɹiːpi/

adjective
comparative creepier, superlative creepiest
1. Moving by creeping along.
  Quotations
  The Beaver brought paper, portfolio, pens, / And ink in unfailing supplies: / While strange creepy creatures came out of their dens, / And watched them with wondering eyes.
  1876, Lewis Carroll, The Hunting of the Snark […] , London: Macmillan, Fit the Fifth.⁠ The Beaver's Lesson
2. (informal) Producing an uneasy fearful sensation, as of things crawling over one's skin.
3. (informal) Causing discomfort or repulsion due to strange or eccentric behaviour.
4. (informal, especially) Causing discomfort through exhibiting sexually inappropriate behaviour.
  Quotations
  "He doesn't look creepy," I said. "Kind of nerdy, in a harmless way."Looks can be deceiving. See that camera? He was always going around with that camera, snapping pictures. Some girls caught him trying to get 'up skirt' shots while they sat at their desks. […]"
  2022, Scott Bell, Pest Cemetery, page 235
5. (informal, uncommon) Feeling an uneasy fearful sensation; creeped out.
  Quotations
  “I felt creepy and afraid,” continued the other, with conviction. “I had the sensation of being seen by someone—as if someone, I mean, was watching me. […]
  1920, Algernon Blackwood, First Hate