a variety of the snow goose that has a bluish-grey body and white head and neck
blue goose in American English
noun
a dark color phase of the snow goose, Chen caerulescens, of North America
Word origin
[1870–75, Amer.]This word is first recorded in the period 1870–75. Other words that entered Englishat around the same time include: Mafia, fifth wheel, giveaway, immobilize, linkage