I wouldn't say there's too much slang tbh most people get confused between Brummie's and those from the Black Country anyway.
We use "bab/babby" as an affectionate term, call a bread roll a "cob", swap the "s" on the end of a word to a "zz", i.e "buzz" instead of "bus", "gambol" is a forward roll, "gulley" is an alleyway...