Main Entry: creepy Pronunciation: \ˈkrē-pē\ Function: adjective Inflected Form(s): creep·i·er; creep·i·est Date: 1836 1 : producing a nervous shivery apprehension <a creepy horror story>; also : eerie 2 : of, relating to, or being a creep : annoyingly unpleasant — creep·i·ly  \-pə-lē\ adverb — creep·i·ness  \-pē-nəs\ noun