mad-dog
LowInformal
Definition
Meaning
A rabid dog; literally, a dog infected with rabies.
Used metaphorically to describe a person or thing that is fiercely aggressive, wildly reckless, or uncontrollably violent.
Linguistics
Semantic Notes
Primarily used as a noun (hyphenated or closed compound). The literal meaning (rabid dog) is medical/zoological. The figurative meaning is vivid and colloquial, often implying a lack of control or sanity in aggression.
Dialectal Variation
British vs American Usage
Differences
No significant difference in core meaning. The compound form (hyphenated or solid) is slightly more common in US informal writing.
Connotations
Identical strong connotations of danger and uncontrolled fury.
Frequency
Equally low frequency in both varieties, used for dramatic effect.
Vocabulary
Collocations
Grammar
Valency Patterns
[person/animal] behaved like a mad-doga mad-dog [attitude/glare]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “run/go mad-dog (colloquial: act with reckless aggression)”
- “mad-dog stare (a fiercely hostile glare)”
Usage
Context Usage
Business
Rare; used metaphorically to criticise overly aggressive competitors or tactics ('their mad-dog approach to negotiations scared off clients').
Academic
Used literally in veterinary/medical contexts.
Everyday
Figurative use to describe an extremely angry or out-of-control person ('He went completely mad-dog when he heard the news').
Technical
Veterinary science for a rabies-infected canine.
Examples
By Part of Speech
verb
American English
- He was just mad-doggin' everyone in the room (very informal/slang).
adjective
British English
- He has a mad-dog determination to win.
American English
- She gave him a mad-dog stare.
Examples
By CEFR Level
- The scary story was about a mad-dog.
- After the accident, the driver was acting like a mad-dog.
- The general was known for his mad-dog tactics, which often disregarded the safety of his own troops.
- The film depicted the dictator's descent into a mad-dog paranoia, lashing out at even his closest allies.
Learning
Memory Aids
Mnemonic
Imagine a MAD DOG foaming at the mouth – that's the picture of uncontrollable rage the word paints.
Conceptual Metaphor
ANGER/AGGRESSION IS RABIES.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with "бешеная собака" used lightly for a very active dog. In English, the metaphorical use is almost always negative and implies dangerous insanity, not just high energy.
Common Mistakes
- Using as a verb (*he mad-dogged me). Not standard.
- Overusing the term for minor anger.
- Spelling as two separate words when using the compound noun form (less common).
Practice
Quiz
In which context is 'mad-dog' used MOST literally?
FAQ
Frequently Asked Questions
No, it's a low-frequency word used for dramatic, vivid description, either in technical (veterinary) or highly informal figurative contexts.
Not in standard English. 'To mad-dog' (to glare aggressively) exists in very informal American slang but is non-standard and should be avoided in formal writing.
In literal use, they are synonyms. 'Rabid dog' is the more clinical term. Figuratively, 'mad-dog' is the preferred compound form for the metaphorical meaning of reckless aggression.
In the noun form ('He's a real mad-dog'), the hyphen is often used, especially in UK English, but the closed compound 'maddog' is also seen, particularly in US informal usage.