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

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

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