Unfortunate name [0] :| or perhaps it was intended? Very clever then. 0: https://en.wikipedia.org/wiki/Jingoism
The company is called Jingling which seems to be a Chinese city, so I highly doubt they named it after some obscure English expression.
It's not that obscure if a nonnative speaker's first reaction is to think "why would anyone want to call a distro by that name"?
It doesn't matter that there is a perfectly reasonable alternative motivation for it ... It's just, you'll never find me wanting to be heard saying "I think you should use jingos!"[1]
Interestingly, it turns out, someone else thought it would be a good brand name too.[2] So you are not alone.
[1]: https://www.bennetyee.org/http_webster.cgi?isindex=jingo&met... [2]: https://buyjingos.com/