look up any word, like pussy:
 
2.
An adjective used to describe something to the extreme, usually used with sleep deprivation.
Man, I'm dead-dog tired. See ya tomorrow, dude.
by Fadre October 24, 2008
 
1.
A dead dog that is not alive.
A dog that is dead is a dead dog.
by The Doctor December 23, 2004
 
3.
A canine that is not alive. Not a "dead dog that is not alive."
Joe: "That's a dead dog;"
Frank: "You mean its not alive????"
Joe: "Yeah...."
by GShrew December 13, 2005