earwig (n.) Look up earwig at Dictionary.com
(Forficula auricularia), Old English earwicga, from eare (see ear (n.1)) + wicga "beetle, worm," probably related to wiggle. So called from the ancient and widespread (but false) belief that the garden pest went into people's ears. Compare French perce-oreille, German ohr-wurm. A Northern England name for it reported from 1650s is twitch-ballock.