Someone who is so stupid it makes you want to stab your eyes so you never have to look at them again
How much of a deadshit is that pie eater over there?
by Signor Deadshit June 26, 2006
The most final of all insults outranked only by 'fucking deadshit'. To be used only when you feel such utter dismay and disgust that no emotion or single word would suffice. to be said in a dull monotonous voice whilst shaking or clutching the head.
"you deadshit"
"you fucking deadshit"
by mespaced July 11, 2008
In Australian speech deadshit is used for someone who is the lowest of the low. You can call your friend a bastard, fuckwit or cunt if you are momentarily mad at them, and it puts them on notice that you are not amused, but if you call them a deadshit , then the relationship is pretty much over. It signifies a line has been crossed.
by Affabeck Lauder September 22, 2017
Someone who is an asshole, prick. Used in many situations wilst driving. or in the presence of an Abrahams
You fucking DEADSHIT pete..
Screaming out of the car window, deadshit!
by Shannon Masters November 26, 2003
1. A shit so excruciatingly massive and voluminous that the shittee blacks out every now and then from straining to pinch it off.

2. The kind of diarrhea that just keeps coming out in a soupy mix of week-old tacos and gastric juices that dehydrates the shitter to the point of hallucination.
"Jesus Christ, did you hear John on the throne last night? He must've excreted a deadshit-ton because he came out an hour later with a lute telling everyone he was Sarah Palin."
by NearLight October 24, 2008
Defined as the amount of shit-tonnage any person can carry at once before they kill themselves. Also used to describe the carrying capacity of U.S. Naval ships.
"What with his girlfriend cheating on him with his sister, and his WoW account being suspended indefinitely, John had a deadshit-ton of problems he couldn't bear."
by NearLight October 24, 2008