That's a dead means the joke is not funny or the joke has no use or meaning any more
1. Brittany: Hey Sarah I just said to Jessica deez nuts , GOT EEEM!

Sarah: 😑 That's a dead
by That's a dead August 28, 2015
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what happens when you die for the final time on a video game and have no more lives left
Dude did you get killed
yeh but im respawning...
dude did you just die again
yeh but now im dead dead i wont be back till next game
by gunslinger4u April 20, 2011
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A term meaning something is extremely accurate, right on target. Hitting the mark. Correct, absolute.
You nailed that description dead on.
by monkiki April 3, 2005
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1) The word you use when you find something hilarious.
2) Not physically alive.
Example 1:
*Person saying something funny*
Other person: Dead

Example 2:
Someone that isn't living anymore.
by fhk x3 May 12, 2017
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" you remember you dated marquel in 7th grade "
nahh ; dead that yo !
by laurenjhaye January 14, 2011
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blown off; rejected; deliberatly singled out; abandoned for reasons unknown.
I like the way my best people straight deaded me.
by Armando August 17, 2004
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To pretend to be dead. To lie down in a manner in which someone would be presumed dead. Usually done with a group of friends for comical reasons or just out of plain boredom. In order to successfully Dead you must have a picture taken of the person Deading and the Dead must be named.
Let's all just start Deading in the elevator.
Bro I'm about to pull off a Dead Elevator, you down?
by mustbenew September 17, 2011
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