From WordNet (r) 3.0 (2006) [wn]:
kick the bucket
v 1: pass from physical life and lose all bodily attributes and
functions necessary to sustain life; "She died from
cancer"; "The children perished in the fire"; "The patient
went peacefully"; "The old guy kicked the bucket at the age
of 102" [syn: die, decease, perish, go, exit,
pass away, expire, pass, kick the bucket, {cash in
one's chips}, buy the farm, conk, give-up the ghost,
drop dead, pop off, choke, croak, snuff it] [ant:
be born]