An insult directed at an individual to highlight their inability to perform a simple task or or otherwise learn from their mistakes and surroundings.

One who has the mental acuity of a corpse's ass.

Not to be confused with the adjective dead-ass or dead-pan which describe the seriousness with which someone emotes or conveys something.
Person A: *pushes on door clearly marked "PULL" *

Person B: *waits frustratedly behind Person A *

Person A: *looks at sign... pushes harder*

Person B @ Person A: I think it's a pull not a push, friend.

Person A: I know.. *Grunts while pushing on door*

Person C: *Walks past person A and B, pulls on door and exits*

Person B: *stares as door slowly swings shut in front of them... continues pushing"

Person B @ Person A: DEADASS!
by Cuddle-scut June 30, 2019
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When you wanna end someones career in any argument, just do this one step yell DEADASS then problem solved.
"Did you drink my fucking juice last night? DEADASS"

"You're a fatass DEADASS"
by SwampyAsser July 22, 2018
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a word for someone that is dead used most likely when you didnt like that person.
that prick finally died?

yeah he became deadass finally
by TheOneandOnlyRealTT December 29, 2005
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Guy 1: The Fuk bro what?!
Guy 2: Yep she just threw my brand new timbs right out the window...deadass b
Guy 3: damn thats cooked
by Typicalnewyorkfag December 11, 2016
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Basically a new yorkers way of saying " for real" or " I swear to god"
Guy 1: Yo I just copped these new timbs dog
Guy 2: Deadass b?
Guy 1: Deadass
by Typicalnewyorkfag December 11, 2016
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The state of being so done with life that you are completely, honestly dead
Friend 1: Did you do the history essay?
Friend 2: I forgot. I'm so deadass dead.
by Radish Car December 14, 2016
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