expression, adverb
easily; without resistance; helplessly
Describes being defeated, destroyed, or overwhelmed with little or no resistance. Often used with verbs like 負ける, やられる, 破れる.
See also: 一溜まりもない
強豪チームに一溜まりもなく負けた。
We lost easily to the strong team.
その古い橋は洪水で一溜まりもなく流された。
The old bridge was helplessly swept away by the flood.
From 一溜まり (ひとたまり, 'a single pause' or 'a moment's resistance') + も (even) + なく (without). Literally 'without even a moment's resistance'.