at no time
if pigs had wings
at latter Lammas
when pigs fly
never ever
not while pussy's a cat
when two Sundays meet
nevah
when two Sundays come together
nary
never've
in a pig's eye
nooit
under no circumstances
nevermore
in no way
Neveruary
nauther
nother
once in a purple moon
when Hell freezes over
unreddened
inexistent
uneverted
second Tuesday of the week
unvenial
persistent
unrelenting
deathless
undying
immortality
relentless
unvisited
only
only if
only when
seldom or ever
under no circumstance
no chance
not for the world
divent
in a pig's arse
no way
nonlitigable
not on your life
by no means
not by a long sight
not a chance
not by a blame sight
non-con