boo

• POS: Interjection, Verb (usu participle)

CIDE DICTIONARY

boo, v. 

 to show displeasure (after a performance or speech) by making a prolonged sound of “boo”.  [WordNet 1.5]

OXFORD DICTIONARY

boo, int., n., & v.
--int.
1 an expression of disapproval or contempt.
2 a sound, made esp. to a child, intended to surprise.
--n. an utterance of boo, esp. as an expression of disapproval or contempt made to a performer etc.
--v. (boos, booed)
1 intr. utter a boo or boos.
2 tr. jeer at (a performer etc.) by booing.

Idiom

can't (or wouldn't) say boo to a goose is very shy or timid.

Etymology

imit.

THESAURUS

boo

Bronx cheer, Mary Jane, bird, booing, cannabis, catcall, give the bird, give the raspberry, grass, hiss, hissing, hoot, pooh, pooh-pooh, pot, raspberry, razz, tea, the bird, weed, whistle at

ROGET THESAURUS

boo

Disrespect

N disrespect, disesteem, disestimation, disparagement irreverence, slight, neglect, spretae injuria formae, superciliousness, vilipendency, vilification, contumely, affront, dishonor, insult, indignity, outrage, discourtesy, practical joking, scurrility, scoffing, sibilance, hissing, sibilation, irrision, derision, mockery, irony, sarcasm, hiss, hoot, boo, gibe, flout, jeer, scoff, gleek, taunt, sneer, quip, fling, wipe, slap in the face, disrespectful, aweless, irreverent, disparaging, insulting, supercilious, contemptuous, patronizing, rude, derisive, sarcastic, scurrile, scurrilous, contumelious, unrespected, unworshiped, unenvied, unsaluted, unregarded, disregarded, disrespectfully.