What does yabu in Korean mean English?

"Yabu" (야부) is not a common word in Korean. It's possible you're thinking of a different word or misheard the pronunciation.

Could you provide more context or information? For example:

* Where did you hear "yabu" used? (In a conversation, a song, a movie, etc.)

* What was the situation or topic?

* What did the speaker/character seem to mean by it?

With more information, I can help you figure out what "yabu" might actually be and what it means.