What does SFBY mean?

SFBY generally refers to nightlife. Nowadays, young people like more free nightlife and can relax themselves appropriately.

Sfby's short spelling letter "Don't take a night bag", S.F.B.Y lowercase pinyin SFBY, of course, has another meaning: SF Express parcel, very simple, and some people say: You didn't see it thoroughly, the key is that the order is reversed, and the old driver burst into laughter.