fall
die in the last ditch
take one's own life
return to dust
self-kill
conk out
eat it
buy the farm
snuff it
take someone to the grave
take someone's life
commit suicide
drop off the hooks
pass in one's checks
bite the biscuit
bite the dust
flatline
cash in one's chips
demise
pass the river
sputter out
peg out
toddle off
cross the Styx
go to sleep
quell
pop one's clogs
turn up one's toes
meet one's doom
go the way of all the earth
depart
join the choir invisible
bite the big one
pay the debt of nature
peg it
suck the kumara
querk
cark it
turn to dust
pass
check out
keel over
cock one's toes
pass on
slip one's wind
go home
hand in one's checks
hand in one's dinner pail
take a dirt nap
croak