holy mackerel

English

Etymology

Recorded from 1803 with uncertain origin, but possibly a euphemism for Holy Mary, with Mackerel being a nickname for Catholics because they ate the fish on Fridays. Another suggested explanation is the practice of selling mackerel on Sundays in the seventeenth century (because its quality deteriorates rapidly), so it was known as a holy fish.

Interjection

holy mackerel!

1. (idiomatic, humorous or euphemistic) An expression of surprise.
   • 1951, Marguerite Wallace Kennedy, My Home on the Range, Ch.3

     Holy Mackerel! Here Comes the Bride!"

Synonyms

• holy cow
• holy moley
• holy smoke
• holy crap
• holy shit

Translations