last straw

Noun

idiomatic uncountable

(idiomatic, almost always preceded by the) A small addition to a burden which causes it to exceed the capacity.

Japanese Meaning

累積した負担に対して、限界を超える引き金となる最後の小さな出来事

彼が三回目の会議を欠席したとき、それがとどめの一撃となり、私は新しいアシスタントを探すことにした。

Sense（1）

(idiomatic, almost always preceded by the) A small addition to a burden which causes it to exceed the capacity.

That's the last straw; it's a petty demand but I’m already under too much work. I quit!