Death and dying expressions from Wikipedia 1

Expression	Definition	Context	Remarks
Assume room temperature	To die	Euphemistic slang	Used by talk radio host Rush Limbaugh when dictator or avowed enemy of US dies
At peace	Dead	Euphemistic
At rest	Dead	Polite
Belly up	Dead	Informal	Orientation of dead fish
Beyond the grave	After death	Neutral	In ref to communication with dead
Beyond the veil	The mysterious place after death	Neutral	Orig used to refer to the 'veil' that hid the Temple's Holy of Holies.
Bite the dust	To die or be killed	Informal	Also means 'failed'
Bite the big one	To die	Informal	North American.
Born asleep	Stillbirth	Neutral
Breathe one's last	To die	Literary
Brown bread	Dead	Slang	Cockney rhyming slang.
Bought the farm	Died	Slang	Also, shortened to 'bought it'
Cark-it	To die	Inf, version of 'croaked it'; common Ireland NZ Australia UK	The guy was running, had a heart attack and carked it.
Cash in one's chips	To die	Informal, euphemistic	Redemption for cash of gambling counters at the end
Candyman	Supernatural suicide	TV/Movie	Say 'Candyman' 5 times looking in a mirror and he comes and kills you with his hooked right hand
Charon	Ferryman of Hades	Neutral	Crosses rivers Styx & Acheron that divide the worlds of living & dead
Come to a sticky end	Die in an unpleasant way	Humorous	British. Also 'to meet a sticky end'.
Counting worms	Dead	Euphemistic
Croak	To die	Slang
Crossed the Jordan	Died	Biblical/Revivalist	Deceased has entered Promised Land (Heaven)
Curtains	Death	Theatrical	Final curtain at a drama
Dead as a dodo	Dead	Informal	Ref extinct flightless bird, Mauritius
Dead as a doornail	Obviously dead	Informal	Cf Dickens start Christmas Carol
Death by Misadventure	Avoidable death	Formal/Legal	Death resulting from risk-taking
Decapitation	Act of killing by removal of head, usually with axe or other blade		Much-favoured method of execution around the world. Notable egs include French Revolution (guillotine) and Tudor times (axe).
Deleted	Murdered	Literary
Defenestration	Act of killing by throwing out of a window
Departed	To die	Neutral
Destroyed	To die	Neutral	Usually refers to animal euthanisation
Die with one's boots on	To die while able, or during activity, as opposed to in infirmity or asleep	Euphemistic	Old West usage: Die in gunfight, cf They Died with Their Boots On Also dying in combat. Brit; cf Iron Maiden Die With Your Boots On
Didn't make it	Killed in action	Euphemistic
Done for	About to die	Neutral
Drop dead	Die suddenly	Neutral	also slang aggressive dismissal
Dropping like flies	Dying in droves	Simile	also falling ill in numbers
Erased	Murdered	Literary
Euthanasia	Assisted suicide	Formal
Exterminate	Kill	Directive	Exclaimed by Daleks (Dr Who) when ordered to kill
Extinct	When a species ceases to exist	Formal
Fading away	To be weakening and close to death	Neutral	Also to be 'fading fast'
Fall off one's perch	To die	Informal
Food for worms	Someone who is dead	Slang	Also 'worm food'
Fratricide	Murder among siblings	Formal
Free one's horses	To die	Neutral