Technically girls can do this too, though it's not as common. For women however it becomes even more diverse and may involve sharting, farting or queefing. Any of these disgusting bodily functions will produce the desired effect.
"What the fuck?! Did you just queef in my face?!"
"Please, it's called a 'South Carolina', honey."
Where we live (in the upstate), yes, it is populated by hicks who tote guns, stack junk cars by the hundreds in their front yards, and give 10% of their income to their local baptist church to get the preacher a new gas-guzzling SUV.
The lowcountry, however, is quite charming, from what we've seen.