
Barking mad
Exaggeration
Expresses extreme behavior; not always literal.

He's barking mad for collecting stamps, but he loves it.
Slang Usage
Used informally, not suitable in formal writing or speech.

I felt barking mad when my computer crashed again.
British Origin
Mainly used in the UK, might not be understood elsewhere.

Mum's barking mad for that British detective show.
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