The Collaborative International Dictionary of English v.0.48:
Whoop \Whoop\, v. i. [imp. & p. p. Whooped; p. pr. & vb. n.
Whooping.] [OE. houpen. See Hoop, v. i.]
1. To utter a whoop, or loud cry, as eagerness, enthusiasm,
or enjoyment; to cry out; to shout; to halloo; to utter a
war whoop; to hoot, as an owl.
Each whooping with a merry shout. --Wordsworth.
When naught was heard but now and then the howl
Of some vile cur, or whooping of the owl. --W.
2. To cough or breathe with a sonorous inspiration, as in