Shit-fer-brains 

A southern term for a very dumb individual, is often used to give someone hell if they mess up on something simple.

"Man I tell you, that boy's got shit-fer-brains, he couldn't tell his own ass from a hole in the ground

Shit-fer-brains by Eusophocleas June 26, 2016

Shit fer brains 

One who displays a lack of common sense
A fuckup

Joe really screwed up the assignment. He's such a shit fer brains.

Shit fer brains by Fred January 19, 2003

shitferbrains

one who displays immense stupidity, and is happy to respond to the term publicly. Shitferbrains is only used in a public forum and has no value in general conversation. Typical venues for use of the word would be building sites etc - The word would be shouted loudly to gain the attention of the subject, who must respond without complaint

Oy shitferbrains go and get me a lefthanded screw driver

response - sure thing boss

shitferbrains by thentu September 21, 2006