To lose it.
Idiomatic translations of "To lose it."
Meanings of "To lose it."
To become extremely angry or upset.
It can also mean "I can't take anymore" or I'm going to lose my calm or sanity. It doesn't inherently mean anger, although it often does mean anger.
Perder el control de las emociones, especialmente al enfadarse o disgustarse. Perder los estribos.