13.
"Dang it" is just a swear. Somewhat similar to блин, I think. Its like a lower level version of "Damn it". (Theres also "darn it")
That is a VERY extreme accent "It aren't no thing". I don't think even the southern U.S. speaks with that much "twisting" of a sentence. It means "It's nothing". In english, we cant say things like "Can't not laugh"(Unable to prevent yourself from laughing). It's great. But I guess, the more uneducated folk haven't been taught how to use them properly, so they say things like "We don't need no school." What it means: We DO need school...... What THEY mean: We don't need school. (With more emphasis on DONT)