be 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.
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.
be barking ˈmad
,be ˈbarking
(British English, informal) completely crazy: You’re playing tennis in this weather? You’re barking mad!Farlex Partner Idioms Dictionary © Farlex 2017