froth at the mouth froth at the mouth2 F0 If a person or animal froths at the mouth, a mass of small bubbles appears from their mouth as the result of a disease. Thesaurus+: ↑General bodily disordersThesaurus+: ↑Veterinary medicine3 F0 INFORMAL to be extremely angry Thesaurus+: ↑Becoming angry and expressing angerMain Entry: ↑froth
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