Last straw and Point of no return

Last straw noun - The final irritation that stretches your patience beyond the limit.

Point of no return and last straw are semantically related. In some cases you can use "Point of no return" instead a noun phrase "Last straw".

Point of no return noun - A line that when crossed permits of no return and typically results in irrevocable commitment.

Last straw and point of no return are semantically related. Sometimes you can use "Last straw" instead a noun phrase "Point of no return".