a dumb priest never got a parish
go over like a lead balloon
fall back
are you deaf
catch no ball
plead the Fifth
the lights are on but nobody's home
vacuous
mute
unapprehending
nonlistening
dissatisfy
whistle in the wind
negativism
let down
nonsubmission
have someone there
pretermission
disappoint
retract
softheaded
wordless
come up with snake eyes
leave someone cold
passivity
preach in the desert
die on one's arse
whistle for
as if
imperfectness
present company excepted
unsayable
misappreciative
not that I know of
lose one's nerve
stonewall
tubelight
tongue-tied
ambitionlessness
lose one's tongue
not be 100 percent on something
underwhelm
underachieve
blow smoke
nonunison
go in one ear and out the other
soundless
nonanswer
misspeak
non-responder
anaudia
unfathoming
swallow one's words
insubmission
responselessness
scant
nonapprehension
make default
so what
uncertainness
unassimilating
nondefiance
unsubmittable
spoil the ship for a ha'p'orth of tar
confuddled
stump
suaku
nonresponse
obmutescent
bottler
nonspeak
tongue-tie
who cares
ill-informed
strike out looking
now what
sit on one's hands
nonconform
nondelivery
give out
nonencounter
unsatisfy
go nowhere
spit it out
make neither head nor tail of
undersing
stonewalling
make head nor tail of
nonintent
bail
anticommunication
rope into
mump
unsubstantiate
intransigence
muteness
silence
indirectness
unsolidarity
pass