What does "boiling point" mean?
A climax or crisis; a high degree of fury, excitement, or outrage. For example, The union's disgust with management has reached the boiling point. This metaphoric term alludes to the temperature at which water boils. [Second half of 1700s]
have a low boiling point
. Become angry quite readily, as in Don't tease her anymore—she has a low boiling point
. This phrase means that it takes less heat than usual for a boiling point to be reached. [First half of 1800s] Also see boil over
; make one's blood boil
Learn more about boiling point