一分の隙もない

いちぶのすきもない

impeccable

隙も与えず

すきもあたえず

before one could, in no time at all, without a gap

油断

ゆだん

negligence, carelessness, inattention, unpreparedness

油断ならない

ゆだんならない

treacherous; dangerous; untrustworthy; sneaky; cunning

油断なく

ゆだんなく

alertly, vigilantly, warily, diligently, attentively

身も世もない

みもよもない

heartrending, desperate, hopeless, full of grief

根も葉もない

ねもはもない

unfounded rumor, unfounded rumour, completely untrue

神も仏もない

かみもほとけもない

There is no God! (used to express despair at the heartlessness of the world), there is no god or Buddha

身も蓋もない

みもふたもない

point blank, blunt

血も涙もない

ちもなみだもない

cold-blooded, unfeeling, heartless, heart of stone, inconsiderate

元も子もない

もともこもない

losing everything, coming to nothing, having lost the interest and the principal

欲も得もない

よくもとくもない

having thought for neither gain nor greed, only wanting to do something (thinking about nothing else)

油断のならない

ゆだんのならない

treacherous; dangerous; untrustworthy; sneaky; cunning

断るまでもなく

ことわるまでもなく

needless to say

手も足も出ない

てもあしもでない

cannot do a thing, feeling handcuffed, being at the end of one's tether, being at one's wit's end

恥も外聞もない

はじもがいぶんもない

not worrying about one's reputation or appearance, not caring what others think

間もない

まもない

after (practically) no time

埒もない

らちもない

incoherent, vague, silly, foolish

気もない

けもない

showing no signs of ~~, there being no hint of ~~