In rural communities in America, a dog that is tied up in a black person's yard through all seasons. Typically has matted fur, fleas, and a frozen water dish in the winter. The YD stands for "yard dog."
Me: I found this dog in a dumpster, and I cant tell what breed it is
My brother: looks like a NYD to me
A shy or quiet, but beautiful girl who is kind, and smart, and important. She may not say much, but her presence lights up a room. She is a great friend, because she is loyal and non- judgemental. Nydia is genuine.
"Girl, your such a Nydia, your so quiet."
"Bro! Check out that Nydia, she's so real and sexy."