be barking mad(redirected from am barking mad)
be barking mad
To be crazy or insane. Although its origin is unknown, the phrase may refer to rabid dogs. It's freezing today, and you're not going to wear a coat? Are you barking mad? You're barking mad if you think that plan will work.
be barking mad(British & Australian old-fashioned)
to be crazy You went swimming in the sea in the middle of winter? You must be barking mad!