PRAIRIE OYSTER Meaning of PRAIRIE OYSTER in English ■ noun1》 a drink made with a raw egg and seasoning, drunk as a cure for a hangover. 2》 ( ~s ) chiefly N. Amer. the testicles of a calf cooked and served as food. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004