Holy Roman barn owl

And exclamation somewhat similar to “oh my god” and “by Jove”

Holy Roman Barn Owl is used exclusively as an exclamation of shock, outrage, horror or surprise such as in the following example:

Nick: Boris has withheld food from millions of the countries poorest children!
Jon: Holy Roman barn own!! What a total shit show!

by Rathgam December 4, 2020