chiggerPronunciation: /ˈtʃɪgə, ˈdʒ-/ (also jigger)Definition of chigger noun 1a tropical flea, the female of which burrows and lays eggs beneath the host’s skin, causing painful sores. Also called chigoe, sand flea.Tunga penetrans, family Tungidae 2North American a harvest mite. Origin: mid 18th century: variant of chigoechigger in other Oxford dictionaries Definition of chigger in the US English dictionary