barking mad

adjective
variants: or barking

Definition of barking mad

chiefly British, informal
: crazy, insane
  • an eccentric personality that verged on barking mad
  • —Mitchell Owens
  • "Another one who thinks you're barking," said Ron, throwing a crumpled letter over his shoulder …
  • —J. K. Rowling

First Known Use of barking mad

1933

in the meaning defined above

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