Final straw

The phrase "final straw" is an idiomatic expression used to describe the last event, action, or circumstance that leads to an individual's decision to take a certain course of action or reach a breaking point. The final straw represents a tipping point or a culmination of various factors leading to a definitive outcome or response. This phrase often implies that a person has reached their limit or tolerance, and the final straw becomes the decisive factor that provokes a significant reaction or decision.