have a cow

have a cow

To get very upset about something, often more than is expected or warranted. Jeez, I'll pay for the damage. Don't have a cow! My mother will have a cow if we get a stain on the new sofa.
See also: cow, have
Farlex Dictionary of Idioms.

have a cow

AMERICAN, INFORMAL
If you have a cow, you become very upset or angry. He'll have a cow if he ever finds out!
See also: cow, have
Collins COBUILD Idioms Dictionary, 3rd ed.

have a cow

become angry, excited, or agitated. North American informal
1990 Susin Nielsen Wheels ‘Don't have a cow,’ she said huffily. ‘It's no big deal.’
See also: cow, have
Farlex Partner Idioms Dictionary

have a ˈcow

(American English, slang) suddenly become very excited or angry: My dad spent $500 on a new coat and my mom had a cow.
See also: cow, have
Farlex Partner Idioms Dictionary

have a cow

Slang To become amazed, angered, or upset: He had a cow when he saw the mess we made.
See also: cow, have
American Heritage® Dictionary of the English Language, Fifth Edition.
See also:
  • Don’t have a cow!
  • don't have a cow
  • Don't have a cow!
  • doots
  • cow doots
  • cow-doots
  • bail up
  • cow chip
  • cow chips
  • cow pie