Boo
Boo definition by Slang.net
This page explains what the slang term "Boo" means. The definition, example, and related terms listed above have been written and compiled by the Slang.net team.
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A term of endearment directed at somebody you like or love; similar to honey or dear; often used to describe a girlfriend or boyfriend but can be used with a close friend too; can be misunderstood as what a ghost says so make sure you don't yell it.