The word used to describe the kind of scene of total and utter desolation, desomation and isolation. Usually uttered to either oneself or to a friend upon the arrival to a party that noone went to/everyone has already been to a totaled the place.
Taken from the British TV drama Deadset, in which the cast find themselves alone in the middle of a post-apocolyptic wasteland dressed in drag and not nearly crunk enough.
"Ah man, Jas' party was a total deadset, no drink, no drugs and nobody even showed up."
"Didn't stop you from projectile vomiting and stealing a TV though did it?"
"Heeeell no."
Not only a fuckwit. A massive fuckwit. Powerfully offensive term. Normally they are extremely hard work to be around. You weighed have to remove yourself from their company or knock them out.
‘That guy singing about short people and picking his nose was a deadset fuckwit. About time someone punched him in the face.’
And dying in yo' bed many years from now, would ya be willing ta trade all da days from dis here day ta dat fo' one chance, just one chance, ta come back here as young men an' tell our enemies dat dey may take our lives but dey will never take our freedom ... YUB NUB!