frothed at the mouth

Verb

froth at the mouth (third-person singular simple present froths at the mouth, present participle frothing at the mouth, simple past and past participle frothed at the mouth)

1. (literally) To spew saliva as froth.
   • What I suffered with that rein for four long months in my lady's carriage, it would be hard to describe, but I am quite sure that, had it lasted much longer, either my health or my temper would have given way. Before that, I never knew what it was to foam at the mouth, but now the action of the...[1877], Anna Sewell, “A Strike for Liberty”, in Black Beauty: […], London: Jarrold and Sons, […], →OCLC, part II, page 109

   Synonyms:

   foam at the mouth, froth at the gash

2. (figuratively) To rage, to vent one's anger.
   • She was almost frothing at the mouth when she heard about the cost of the car repairs.