hoot 1 
(ht)
(ht)v. hoot·ed, hoot·ing, hoots
v.intr.
1. To utter the characteristic cry of an owl.
2. To make a loud raucous cry, especially of derision or contempt.
v.tr.
1. To shout down or drive off with jeering cries: hooted the speaker off the platform.
2. To express or convey by hooting: hooted their disgust.
n.
Idiom: 1.
a. The characteristic cry of an owl.
b. A sound suggesting the cry of an owl, especially the sound of a horn.
2. A cry of scorn or derision.
3. Informal One that is hilariously funny: "Emmett, that skirt is a hoot!" (Bobbie Ann Mason).
not give/care a hoot
To be completely indifferent to: I don't give a hoot what you think.
[Middle English houten, of imitative origin.]