Noun (Plur: Sandgooses): A mythical black-and-white beast purportedly found only in the Kalahari desert and Albion. Said to speak English at approximately the same level as a 3-year-old child.

the mythical sandgoose is a strange bird, of which many stories have been told.
It lives in the desert and has been known to learn languages to the degree of a small child - often surprising visitors which its speech.