Refers to nigga cootie war, from the famous kpop song singing Korean that sounds "nigga cootie war,
poggers butthole".
This is a way of using the n word without getting criticized since you can just say you are speaking Korean, but really you are
just saying the n word. Nigga just means "you are" in Korean.
If you use it enough, your friend might join you to sing "
poggers butthole". Which is the sequel of this amazing sentence and you and your friends can get away with anything ;)