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to foam at the mouth
01
to become extremely furious about something
![to [foam|froth] at the mouth definition and meaning](https://cdn.langeek.co/photo/28812/original/angry?type=jpeg "to [foam|froth] at the mouth definition and meaning")
What is the origin of the idiom "foam at the mouth" and when to use it?
The phrase "foam at the mouth" has its origins in the physical symptom associated with rabies, a viral disease that affects mammals. When an animal such as a dog contracts rabies, the virus affects the central nervous system, leading to erratic behavior. This idiom is commonly used in discussions of heated arguments, intense confrontations, or instances of extreme frustration.
02
*** (especially of an animal) to have a mass of small bubbles in and around its mouth, especially because it is sick or angry
例
I have a feeling she will froth at the mouth when she discovers the mistake, demanding immediate rectification.
Every time he hears that song, he foams at the mouth and goes on a rant about how much he despises it.
She foamed at the mouth when she found out about the betrayal, expressing her anger with vivid and aggressive language.
She froths at the mouth whenever someone challenges her opinions, unable to handle differing viewpoints.
Yesterday, he foamed at the mouth during the argument, shouting insults and slamming doors in frustration.
