foam at the mouth

Idioms  

1. Be extremely angry, as in She was foaming at the mouth over the judge's ruling. This hyperbolic term uses the verb foam in the sense of “froth at the mouth,” a usage generally applied to animals such as horses and dating from about a.d. 950. [1400s]

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Example Sentences

Also, Cassiopeia was still rolling on the ground, twitching and foaming at the mouth quite brilliantly.

From Literature

Hernandez told police she found her baby foaming at the mouth and having an apparent seizure after emerging from her procedure at Always Beautiful Medical Spa, according to the police report.

From Los Angeles Times

She also told the BBC her cat needed to be put down after straying into the police forensic tent during the search and began "convulsing and foaming at the mouth".

From BBC

Ms Benson said her son started foaming at the mouth and coughing up blood, so she decided to try to bring him to hospital herself.

From BBC

Mr Parsons, of the South Western Ambulance Service, said when he checked Ms Skripal she had a “slow heart rate” and was “foaming at the mouth”.

From BBC