We don't have any synonyms for boos yet.
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Definition of boos:
(n) :
A derisive shout made to indicate disapproval.
(v) :
(intransitive) To shout extended boos derisively.
(v) :
(transitive) To shout extended boos at, as a form of disapproval or derision.
(n) :
(US, Canada, African-American Vernacular, slang) A close acquaintance or significant other.
(n) :
(slang) Cannabis.
(n) :
A tail feather from an ostrich.