Frisco has been said for a long time by black San Franciscans (of which there are currently so few there is literally a movie called the last black man in San Francisco). Cringe if you want but there is history behind calling SF Frisco in certain communities.

interesting article/source: https://www.kqed.org/news/11339599/why-do-some-hate-the-nick...

"Frisco" is actually an old school blue-collar nickname for SF. My uncle and all his boomer stevedore buddies use it on the reg.

https://www.quora.com/Why-do-some-people-call-San-Francisco-...