mad as a

(as) mad as a hatter

1. Crazy or deranged; particularly eccentric. I know some of my students think I'm as mad as a hatter because of my weird methods. I'll be mad as a hatter if I have to deal with these screaming toddlers for much longer. My family thinks I'm as mad as a hatter just because I practice a form of alternative medicine using magnetic fields.

2. Particularly cross or angry. Mom was mad as a hatter after I dented her brand-new car. John gets as mad as a hatter when he starts losing. Tiffany will be mad as a hatter when she finds out that her so-called friends started that awful rumor about her.

See also: hatter, mad

(as) mad as a March hare

The phrase alludes to hares' erratic behavior during their breeding season.

1. Crazy or deranged; particularly eccentric. I know some of my students think I'm as mad as a March hare because of my weird methods. I'll be mad as a March hare if I have to deal with these screaming toddlers for much longer. My family thinks I'm as mad as a March hare just because I practice a form of alternative medicine using magnetic fields.

2. Particularly cross or angry. Mom was mad as a March hare after I dented her brand-new car. John gets as mad as a March hare when he starts losing. Tiffany will be mad as a March hare when she finds out that her so-called friends started that awful rumor about her.

See also: hare, mad, march

Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.

mad as a

hatter/March hare

Crazy; mentally deranged.

See also: mad

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.