From Longman Dictionary of Contemporary Englishbe the last strawbe the last strawto be the final thing in a series of annoying things that makes someone very angry He’d broken his promise again, and it was the last straw. → last
Examples from the Corpus
be the last straw• For Amy this was the last straw.• For some reason that Jinny did not quite understand, it was the last straw.• For some, the effort to silence Zundel was the last straw.• His electoral thefts were the last straw.• Sending in bailiffs was the last straw.• Mr Brown said the planned charges were the last straw for customers already angry over banks' high-handed attitude.• Transport pressure groups believe this will be the last straw for some services.• My getting this malignancy is the last straw, in her opinion. 