The Collaborative International Dictionary of English v.0.48:

Hoot \Hoot\, v. t.
   To assail with contemptuous cries or shouts; to follow with
   derisive shouts.
   [1913 Webster]

         Partridge and his clan may hoot me for a cheat.
                                                  --Swift.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Hoot \Hoot\, n.
   1. A derisive cry or shout. --Glanvill.
      [1913 Webster]

   2. The cry of an owl.
      [1913 Webster]

   3. A very funny event, person, or experience; as, watching
      Jack try to catch that greased pig was a hoot.
      [PJC]

   Hoot owl (Zool.), the barred owl (Syrnium nebulosum). See
      Barred owl.

   not give a hoot not care at all.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Hoot \Hoot\ (h[=oo]t), v. i. [imp. & p. p. Hooted; p. pr. &
   vb. n. Hooting.] [OE. hoten, houten, huten; cf. OSw. huta,
   Sw. huta ut to take one up sharply, fr. Sw. hut interj.,
   begone! cf. also W. hwt off! off with it! away! hoot!]
   1. To cry out or shout in contempt.
      [1913 Webster]

            Matrons and girls shall hoot at thee no more.
                                                  --Dryden.
      [1913 Webster]

   2. To make the peculiar cry of an owl.
      [1913 Webster]

            The clamorous owl that nightly hoots. --Shak.
      [1913 Webster]

WordNet (r) 3.0 (2006):

hoot
    n 1: a loud raucous cry (as of an owl)
    2: a cry or noise made to express displeasure or contempt [syn:
       boo, hoot, Bronx cheer, hiss, raspberry, razzing,
       razz, snort, bird]
    3: something of little value; "his promise is not worth a damn";
       "not worth one red cent"; "not worth shucks" [syn: damn,
       darn, hoot, red cent, shit, shucks, tinker's
       damn, tinker's dam]
    v 1: to utter a loud clamorous shout; "the toughs and blades of
         the city hoot and bang their drums, drink arak, play dice,
         and dance"
    2: utter the characteristic sound of owls

Moby Thesaurus II by Grady Ward, 1.0:

145 Moby Thesaurus words for "hoot":
   Bronx, Bronx cheer, a continental, a curse, a damn, a darn, a hoot,
   bagatelle, bark, battle cry, bauble, bawl, bean, bellow, bibelot,
   bird, bit, boo, booing, brass farthing, button, cackle, call,
   carol, catcall, caterwaul, caw, cent, chatter, cheep, cheer, chirk,
   chirp, chirr, chirrup, chitter, chuck, clack, cluck,
   cock-a-doodle-doo, coo, croak, cronk, crow, cry, cuckoo, curio,
   drum, farce, farthing, feather, fig, fleabite, folderol, fribble,
   frippery, gabble, gaggle, gaud, gewgaw, gimcrack, give the bird,
   give the raspberry, gobble, guggle, hail, hair, halfpenny, halloo,
   hill of beans, hiss, hissing, holler, hollo, honk, hoo, howl,
   hurrah, jest, joke, kickshaw, knickknack, knickknackery, minikin,
   mockery, molehill, peep, peppercorn, picayune, pin, pinch of snuff,
   pinprick, pip, pipe, quack, rallying cry, rap, raspberry, razz,
   red cent, roar, roll, row of pins, rush, scold, scream, screech,
   shit, shout, shriek, sing, snap, sneeshing, sou, squall, squawk,
   squeal, straw, the bird, toy, trifle, trill, trinket, triviality,
   tuppence, tweet, twit, twitter, two cents, twopence, war cry,
   war whoop, warble, whim-wham, whistle, whistle at, whoop, yammer,
   yap, yawl, yawp, yell, yelp, yo-ho, yowl