Don't have a cow!

don't have a cow

slang Don't get upset. Don't have a cow—I'm sure we'll find a solution to this problem. I only borrowed one of your shirts, so don't have a cow!
See also: cow, have
Farlex Dictionary of Idioms.

Don't have a cow!

Calm down!; Don't get so excited! (Made famous in the television show, The Simpsons.) Chill out, man! Don't have a cow! Aw, don't have a cow, Dad!
See also: have
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • Don’t have a cow!
  • don't have a cow
  • have a cow
  • bowel
  • (someone's) secret is safe with (one)
  • all in (one's) head
  • (I) won't tell a soul
  • doots
  • cow doots
  • cow-doots