Definition

Verb phrase: - To be in a state of extremely intense, uncontrolled, and often visibly furious anger: This idiom describes a person who is so angry that they are metaphorically (or, in its literal origin, physically) producing foam or froth at the mouth, akin to a rabid animal. It implies rage that is overwhelming and obvious.

Usage and Examples

• Primary Usage: Used to describe someone exhibiting extreme, furious anger.
  • When he saw the damage to his car, he started foaming at the mouth.
  • The manager was foaming at the mouth after the team lost the crucial game.
  • You don't need to foam at the mouth; let's discuss this calmly.

Advanced Usage and Nuance

• The phrase is hyperbolic and vivid. It is rarely used for mild irritation; it is reserved for describing explosive, almost irrational fury.
• It often carries a connotation of the anger being disproportionate or the person losing self-control.
  • The politician's detractors were foaming at the mouth over the scandal, demanding immediate resignation.

Variants and Related Words

• Foam (verb): To form or produce a mass of small bubbles.
  • The waves foamed against the rocks.
• Froth (noun/verb): A synonym for foam, often used interchangeably in the literal sense.
• Rabid (adj): Literally infected with rabies; figuratively showing uncontrollable enthusiasm or extreme anger, which is the etymological link to "foam at the mouth."

Synonyms

• Be in a rage: To be very angry.
• Be furious: To be full of intense anger.
• Be beside oneself (with anger): To be so emotional, especially with anger, as to lose self-control.
• See red: To become very angry suddenly.
• Have a fit: To experience a sudden outburst of anger.

Related Idioms and Phrases

• Go ballistic: To become very angry and start shouting.
  • My dad will go ballistic when he finds out.
• Hit the roof / Go through the roof: To become very angry suddenly.
  • She hit the roof when she saw the mess in the kitchen.
• Blow a fuse / Blow one's top: To lose one's temper explosively.
  • The constant delays finally made him blow his top.

Notes on Meaning

• Literal Origin: The phrase originates from the physical symptom of rabies (hydrophobia) in animals and humans, where difficulty swallowing causes saliva to accumulate and appear as foam around the mouth. The figurative use draws directly from this alarming visual.
• Figurative Meaning: In modern use, it is almost exclusively figurative. It describes a state of extreme, sputtering anger where a person might be shouting, gesticulating wildly, or unable to speak coherently due to rage.

Verb

1. be in a state of uncontrolled anger