213 euphemisms for dying over at Dead & Buried. I'm sure you'll find one that works just right.
From Greek allusions sowing the Elysian fields
to Mafia ones- get whacked or knocked off
to the politically correct - negative patient care outcome
to the biblical - go the way of all earth
to Shakespeare- the journey's end
to the computer geek -cached in his chips
to chefs -fettuccine al dead-o