All of my contributions here are last words as I have a book on them at the moment.
"Get the fucking nuns away from me!"
Last words of Norman Douglas - British Author
"Bugger Bognor."
Last words of King George V of Great Britain
(he said this after his doctor had come up with the idea that he should go and relax in Bognor Regis, an English seaside town.)
"They couldn't hit an elephant at this distance."
Some of the last - but not final - words of General John Sedgwick, Union Commander in the U.S. Civil War. He was shot by a sniper a few minutes afterwards, at the battle of Spotsylvania on May 9 1864.
And finally, an anonymous one:
"Dying can't be that bad of a thing; I mean, everybody's doing it."