An idiot; one who seems to have shit instead of brains, thus severely limiting their thought capacity.
Hey shit-for-brains, you fucked up again didn't you?
by progamer124 January 19, 2003
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Stupidity; idiocy; etc. A person who has "shit for brains" behaves stupidly. "Shit for brains" refers to brainlessness.
Gee, Jim, you are one stupid ass; you must have shit for brains!
by RC59 September 4, 2013
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A phrase used to express how excited or mind-blown or confused you are feeling.
Snooter: Oh my GAWD!! That Inception movie was sooooo good.
Smitty: OMG, I had to watch it three times... I shit a brain the first time.

Snooter: Oh my GAWD!! That movie Memento was sooooo crazy.
Smitty: OMG, I had to watch it six times... I shit a brain the first five times.

Snooter: Oh my GAWD!! That movie Requiem for a Dream was sooooo intense.
Smitty: Uh... I actually had a seizure during that one. I shit my pants.
Snooter: For reals? Oh... my... gawd.
Smitty: yeah... flopped around for... well... through the rest of the movie, actually. My cat just watched me... he didn't call 911 or help out... so... I missed most of that movie. Not a big fan...
by PDXJohnny99 April 29, 2013
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1. Stupid. Careless.

2. A person evincing these characteristics.
1. "What a shit for brains thing to do."

2. "That shit for brains Bob left the oven on when he left for Jamaica."
by Famous Mortimer January 24, 2003
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It means that someone is extremely stupid that they don't have a functional brain, instead they have shit (meaning nothing) where their brain is supposed to be.
Person # 1: Where the hell is Ray?
Person # 2: I don't know, I don't think he's coming tonight.
Person # 1: He's such a fucking idiot, he's ruining it for me too, I swear he has shit for brains!"
by LILR1 July 23, 2008
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A serious medical condition where fecal matter has replaced brain matter. Dangerous, but with low mortality rate.

Symptoms: Verbal diarrhea, poor decision making skills and acne.

Cure: There is no known cure, recommend quarantine from general populace.
Exhibit A: George W Bush - Ran up a big bill, couldn't find a WMD or Osama in 2 terms.
Exhibit B: Everyone who voted for him.
Exhibit C: Most politicians.

Usage: Your alcoholic dad has shit for brains, you are a credit to the family.
by Bushwhacked June 25, 2011
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noun; any animal having shit substituted for brains in the region of the skull: a direct result of having ones head up ones ass
That Jim is one of the dumbest mother fuckers I know. What a fucking "shit for brains".
by green giant March 9, 2003
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