look up any word, like dirty sanchez:
 
2.
being more dead.
Kimmy is deader than martin. :)
by Kimmychuuuuu June 15, 2012
 
1.
To make something deader, you must first kill it, then kill it a second time (and maybe a third time, just to be on the safe side)
I killed Shmouze, and to make sure he didn't come back as a zombie, I made him deader.
by CartlidgeIsGay December 30, 2008
 
3.
A text message in which the person who receives it can no longer continue the conversation without saying something awkward or out-of-place.
Josh: I was macking on Joy last night.
Ben: Word? How did it go?
Josh: Wack. She sent me a deader.
Ben: That sucks, what a bitch.
by D-Bllock May 26, 2009