holy moly
/ˌhōlē ˈmōlē
/(also holy moley)
exclamation US dated or humorous
Used to express surprise or dismay: holy moly, this is exciting news!...
- Not many decent games in the first half of this year—but, holy moly, wait until the second half.
- The report was released, and, holy moly, what Clark had said was in the report was not.
- Holy moly, it's already the end of summer.
Origin
Late 19th century: alteration of holy Moses, popularized in the 1940s by the character Captain Marvel in DC Comics' comic book of the same name.