This is the 7973rd most frequent Polish word.
nbc
The Polish word "nbc" has no meaning; it is likely a typo or abbreviation.
In this sentence, 'nbc' refers to the name of a television broadcasting company.
NBC transmituje wiadomości codziennie.
NBC broadcasts news every day.
Here, 'nbc' is an acronym or shorthand expression meaning 'niezbyt ciekawa' (not very interesting).
Jego odpowiedź była nbc, czyli niezbyt ciekawa.
His response was nbc, meaning 'not very interesting'.
In this case, 'nbc' is a chemical abbreviation within scientific terminology.