Meaning

noun any plant (as ivy or periwinkle) that grows by creeping

noun a person who crawls or creeps along the ground

noun any of various small insectivorous birds of the northern hemisphere that climb up a tree trunk supporting themselves on stiff tail feathers and their feet

originFrom Middle English crepere, from Old English crēopere, equivalent to creep + -er. Slang usage derived from phrase give the creeps or creep out (distinct from merely one who creeps).

Etymology from Wiktionary, CC BY-SA 3.0