I've seen many instances where verbs are ended using 냐... or ㅑ... specifically in sentences that seem to make statements or questions that are directed at another person.
Here is an example sentence from the drama Coffee Prince: 그러길래 엄마 한테왜 덤비냐?
Here is another example that I will be better to understand:무슨 말이야?
From the context of the conversation, I understand that to read.. what you you mean?, or why do you say that?
So is 야 just a fast way of eliminating 너는 from a question? I'm so confused.
Could you please provide some very simple example sentences, using 냐? and 야?