shitting niggers 

A term of distress, usually said for shock value when you're mad.

My mom was shitting niggers when she found the pot stash in my bedroom.

shitting niggers by sanesandwich September 8, 2007

field shitting nigger

Specifically, it means an African, since the vast majority of them are both black and lack the incredibly advanced technology of indoor plumbing, thus the need to defecate in a field. But can general be used to call someone poor in a much more creative and offensive way.

Um, yeah, I'm not going to eat at Arby's, I have money, I'm not a field shitting nigger.

field shitting nigger by Testicle Tickler June 15, 2013