>>5391431 PB

>https://web.archive.org/web/20190226084247/https://wtkr.com/2019/02/25/navy-returns-to-flying-union-jack/

A jack is a national (originally naval) flag flown from a short jackstaff at the bow (front) of a vessel, while the ensign is flown on the stern (rear).

An anon Jack is when the baker is thanked too many times. I'm not posting that image.