- Boo
- Pronunciation:
-
\ˈbü\
- Function:
- interjection
- Etymology:
- Middle English bo
- Date:
- 15th century
—used to express contempt or disapproval or to startle or frighten
boo. (2008). In Merriam-Webster Online Dictionary. Retrieved May 15, 2008, from //www.merriam-webster.com/dictionary/boo
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