be as mad as a hornet

(redirected from am as mad as a hornet)

be as mad as a hornet

To be very angry. Primarily heard in US. Mom was as mad as a hornet after I dented her brand-new car.
See also: hornet, mad

be as mad as a hornet

  (American)
to be very angry
Usage notes: A hornet is a large insect which stings people.
He was as mad as a hornet when he heard what she said about him.
See also: hornet, mad