California whatever
A style of dress that is completely eclectic. Often inappropriate to the formality of the occasion, but never commented upon. Clothes that you feel comfortable in and don't have to worry about color coordination, about style, or about offending anyone else. Frequently out of place, but with so many other California whatevers not even noticed.

Mix and not match wear.

The wearing of beach wear away from the beach.
Are you going to the church social tonight?
I don't know, what's the dress code?
The pastor said "California whatever", so in this heat it'll be shorts, a tank top and flipflops.

She was so strangely dressed for graduation that she must have though it said California whatever.

There was no dress code at the shop so we experimented with California whatever every day.

My brother, the surfer, is a true California whatever aficionado.