CHINCH Meaning of CHINCH in English n. (in full chinch-bug) US 1 a small insect, Blissus leucopterus, that destroys the shoots of grasses and grains. 2 a bedbug. [ Sp. chinche f. L cimex -icis ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012