Meanings
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 holy fish.
How to pronounce "holy mackerel":
AU
An expression of surprise.
Example Sentences
1
She looked stunning in her new dress—holy mackerel!
2
I just found out I got accepted into my dream college—holy mackerel!
3
He won the race by a mile—holy mackerel, he's fast.
4
The concert was amazing—holy mackerel, what a performance!
5
I just saw a shooting star—holy mackerel, what a sight!