I used to know the old Middlesex County medical examiner back in the late 1970s (Dr Terrance Dow, a sweet old man who walked around Harvard Square with an even older--in dog years--German Sheppard.) He recounted the tale of an autopsy he was about to perform on a woman. When he pulled down the sheet, he saw tattooed over her breasts: "Scotland Forever!"
So, you're trying to top that. 
Im gonna have a tattoo saying "prod before you cut".
"First one to laugh gets haunted"
"Looking good, Dr. Smith"
That has a tiny chance of spooking some coroner.
"You should see the other guy"?
"You should see the other guy"?
Hahaha.
"Hypochondriac"
"Told you i was ill"
"If found, please return to..."
I've always wanted to donate my body to the zoo, I've eaten so many animals, it only seems fair.
But this is a good second option.
It would be a real blow if you tried to do that and the zoo contested the will. Still, you'd be gone and it wouldn't matter to you.
My name is Hammond, and over the years I have donated thousands of my organs.
Ta-DAH!
When no relatives are around to claim a body, government distributes the bodies to the medical and science labs.
Good idea.
There should be a book called "A Hundred and One Uses of a Dead Hamster."
Chair!!!!
Sorry, BT. 
Of course, I shoud have mentioned the follow up, "Half a Dozen uses for a Lethargic Tigrrr."
+1 friend ?