
1) Alarming shout 2) Angry audience cry 3) Angry sound 4) Audience disapproval 5) Audience insult 6) Audience jeer 7) Audience put-down 8) Audience rebuke 9) Bad sound at a campaign rally 10) Berry lead-in on a cereal box 11) Bird 12) Bit of heckling 13) Bleachers cry 14) Bleachers sound 15) Brazilian invention
Found on
https://www.crosswordclues.com/clue/boo

1) Hiss 2) Jeer 3) Razzing
Found on
https://www.crosswordclues.com/clue/boo
[character] Boos, known in Japan as テレサ, are fictional ghosts from the Mario and Yoshi series of video games. They first appeared as a common enemy in 1988`s Super Mario Bros. 3, in which they were called Boo Diddleys (a reference to the American rhythm and blues singer Bo Diddley). Since then, they have been a mainstay in the series,...
Found on
http://en.wikipedia.org/wiki/Boo_(character)
[programming language] Boo is an object-oriented, statically typed, general-purpose programming language that seeks to make use of the Common Language Infrastructure`s support for Unicode, internationalization, and web applications, while using a Python-inspired syntax and a special focus on language and compiler extensibility. Some feature...
Found on
http://en.wikipedia.org/wiki/Boo_(programming_language)

A boô (also spelled boo or boe) Nl-Boô.ogg is an old Saxon building where a farmer could spend the night with his cattle if he let them graze far outside the village. The building, which had separate areas for cattle and farmer to live, would have been made with cheap materials. Walls were made of straw or braided twigs covered in cow manure or ...
Found on
http://en.wikipedia.org/wiki/Boô

In the Viking tradition, Bo or Boh was a fierce Gothic captain and a son of Odin. When Viking troops surprised their enemies they invoke his name, calling out Bo! The custom lives on in Britain where it is customary to shout boo! When taking someone by surprise.
Found on
http://www.probertencyclopaedia.com/browse/AB.HTM

Boo is Black-American slang for a derivative of jabooby, marijuana, so called because it sometimes induces anxiety or fear.
Found on
http://www.probertencyclopaedia.com/browse/ZBA.HTM

marijuana; although generally obsolete, sometimes used humorously
Found on
http://www.psychedelic-library.org/mjsmokersglos.htm

[
n] - a cry or noise made to express displeasure or contempt 2. [v] - show displeasure, as after a performance or speech
Found on
http://www.webdictionary.co.uk/definition.php?query=boo

Brake On/Off
Found on
http://www3.sympatico.ca/dhaughey/j1930.htm

Black-American slang for a derivative of jabooby, marijuana, so called because it sometimes induces anxiety or fear.
Found on
https://www.easypacelearning.com/english-books/slang-words-a-to-z/375-slang
hoot 2 Bronx cheer noun a cry or noise made to express displeasure or contempt
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.