Hypertext Webster Gateway: "boo"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Bo \Bo\, interj. [Cf. W. bw, an interj. of threatening or
frightening; n., terror, fear, dread.]
An exclamation used to startle or frighten. [Spelt also {boh}
and {boo}.]
From WordNet (r) 1.7 (wn)
boo
n : a cry or noise made to express displeasure or contempt [syn:
{hoot}, {Bronx cheer}, {hiss}, {raspberry}, {razzing}, {snort},
{bird}]
v : show displeasure, as after a performance or speech [syn: {hiss}]
[ant: {applaud}]
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