Do you know the song named "Hello"? There is a sentence with the wrong grammar rule: it don't matter. It should be "It doesn't matter". But Aldele used the word "don't" instead of "doesn't" because "don't" fits the rythem. (: so, maybe this is what you are looking for.
Actually, I watched a video on Facebook about the conversation between 2 guys. One said " It's going down". The other said "No, It don't, it don't go down". I felt weird. English is crazy. English writing and English speaking are much different. I think so.