Originally a french term, Grand gousier means “Big Throat” .
Its use in english comes from the 16th Century French series The Life of Gargantua and of Pantagruel by François Rabelais.
Grandgousier is a fictional character in Gargantua, the second story of the series. He is characterized by “an appreciation of good living, good heart, and all of life’s pleasures.” [wikipedia]