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!