A braid is a unit of measurement that can be applied to many different things. Its origin comes from the saying "hair" ex. (move that just a hair this way) This is just a new way to say this. You can also use any other hair style in place of braid ex. Tail, bun, rat tail, updo, messy bun exc.
I'll see you in a Braid man.
Catch you in a Braid.
I havent seen that dude in a Braid!