一溜まりも無い

プログレッシブ和英中辞典(第4版)

ひとたまりもない【一^×溜まりも無い】

一たまりもなく very easily; without the least resistance

家々は山津波にあってひとたまりもなく流されてしまった
The houses were carried away easily by the landslide.

我がチームはひとたまりもなく負けた
Our team was defeated without being able to put up the least resistance.／The opposing team defeated us without any difficulty.

彼の毒舌に掛かってはひとたまりもない
No one can stand up to his scathing tongue.

出典　小学館「プログレッシブ和英中辞典(第4版)」