The last straw is the final small problem that makes you finally explode. That was the last straw, the last straw for the neighbours, one last straw.
The point is that the thing itself is trivial and the weight behind it is not. It comes from the saying about the straw that broke the camel's back.
1phrasethe last strawThe final small problem that makes you finally explode.
“The broken kettle was the last straw after a week like that.”
the last straw is a phrase.
Also accepted in games: last straw
Practised in Idioms