Black Snake Moan is an old song I think.
Here are the lyrics
I - I ain't got no mama now
I - I ain't got no mama now
She told me late last night, "You don't need no mama no how"
Mmm, mmm, black snake crawlin' in my room
Mmm, mmm, black snake crawlin' in my room
Some pretty mama better come and get this black snake soon
Ohh-oh, that must have been a bed bug, baby a chinch can't bite that hard1
Ohh-oh, that must have been a bed bug, honey a chinch can't bite that hard
Ask my sugar for fifty cents, she said "Lemon, ain't a child in the yard"
Mama, that's all right, mama that's all right for you
Mama, that's all right, mama that's all right for you
Mama, that's all right, most seen all you do2
Mmm, mmm, what's the matter now?
Mmm, mmm, honey what's the matter now?
Sugar, what's the matter, don't like no black snake no how
Mmm, mmm, wonder where my black snake gone?
Mmm, mmm, wonder where this black snake gone?
Black snake mama done run my darlin' home
IMO it ties in well with the feeling of the movie. The movie is so strange and completely different than anything I've seen before that I think an obscure title like this is well fitting. BTW I see that the movie has it's own myspace page
www.myspace.com/blacksnakemoanmovie I've put sone banners on my profile because the movie really deserves more recognition IMO.