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1. Boo!
Boo! is:
- To scare people very much.

And exist Boo to, that means:
- Scare people, but not veryyyy scary.
- Girlfriend or boyfriend.

Justin: Sam, where are you?
*Sam comes and Justin don't sees her*
Sam: Boo!
Justin: Holy sh*t!

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Justin: Sam, wanna be my boo?
Sam: No f*ckin' way!
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