foam at the mouth

verb2

1. •
   To spew saliva as foam.

   • The servant, who had not stayed long enough to have crossed the court to Conrad’s apartment, came running back breathless, in a frantic manner, his eyes staring, and foaming at the mouth. — 1764
2. •
   (figurative) To rage, vent one's anger.

   • Various groups in Mumbai filed police complaints about the alleged obscenity of the show. Some TV anchors foamed at the mouth over how the “modesty of Indian culture” had been desecrated. — 2015