whooper noun. ['hu:pǝ, w-] Also (earlier) hooper ['hu:p-]. M16.
[from WHOOP verb + -ER¹.]
A person who or animal that whoops; spec. (a) = whooper swan below; (b) N. Amer. = whooping crane s.v. WHOOPING ppl adjective.

Comb.:
whooper swan a large swan, Cygnus cygnus, which has a yellow and black bill and breeds in northern Eurasia and Greenland.

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