Wiktionary
a. Very tired; completely exhausted.
Wikipedia
Dead Tired is a 1994 French comedy film directed by Michel Blanc. It was entered into the 1994 Cannes Film Festival.
Usage examples of "dead tired".
Or maybe it just seemed like that, since I was dead tired and wanted to be by myself.
OR maybe it just seemed like that, since I was dead tired and wanted to be by myself The Were pack was there, all in human form and all more or less dressed, to my relief.
He was dead tired, and he slept soundly, watched over by the mustang.
I wished our walk home didn't have to end, even though I was dead tired - but probably not as tired as the Krushers.
I was dead tired but I was insatiable, wanting to feel him inside me one more time before we slept.
We are all dead tired, except the Hired Man, who seems to be made of india-rubber.
Wall, he wuz so dead tired by this time, that we sot sail homewards.
That's a pretty bad business in the dark, when you're dead tired with the day's tramp.