wahoo

Concise Oxford English Dictionary © 2008 Oxford University Press:
wahoo1 /wɑːˈhuː/

▶noun

• 1 (also wahoo elm) a North American elm which yields useful wood. [Ulmus alata.]

• 2 a North American spindle tree. [Genus Euonymus: two species.]

– origin C18: sense 1 perh. from Creek ahá-hwa ‘walnut’; sense 2 from Dakota, literally ‘arrow wood’.

Concise Oxford English Dictionary © 2008 Oxford University Press:
wahoo2 /wɑːˈhuː/

▶noun a large predatory tropical marine fish of the mackerel family, prized as a game fish. [Acanthocybium solanderi.]

– origin early 20th cent.: of unknown origin.

Concise Oxford English Dictionary © 2008 Oxford University Press:
wahoo3 /wɑːˈhuː/

▶exclamation N. Amer. another way of saying yahoo2.