What does byg mean in modern English?

"Byg" is not a word in modern English. It might be a misspelling of a similar-sounding word, or it could be a slang term or regional dialect word that is not widely recognized.

To help me understand what you're looking for, please provide more context:

* What is the full sentence or phrase where you saw "byg"?

* What is the topic or subject being discussed?

* What is your native language?

With more information, I can better understand what you're asking and provide a helpful answer.