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/60628/original/angry?type=jpeg "to [foam|froth] at the mouth definition and meaning")
例
Every time he hears that song, he foams at the mouth and goes on a rant about how much he despises it.
She froths at the mouth whenever someone challenges her opinions, unable to handle differing viewpoints.
02
*** (especially of an animal) to have a mass of small bubbles in and around its mouth, especially because it is sick or angry
