Chris Brown -- Reppin' Bloods on Instagram Now

Chris Brown continues to throw out gang language all over the place ... this time dropping Bloods references on Instagram.

The post was quickly deleted, but Brown captioned a mundane photo of his shoes by writing, "It's bool! I stand on my own two feet when life gets brazy."

"Bool" and "brazy" are terms used by the Bloods ... replacing the first letters of certain words with a B is a common practice.