All depends on the crew you are with, if everyone is cool with you then you probably can say it and people will "let you slide" In a new group you take your chances, someone might start shit just to do it. The more you sound "authentic" the better your chances, as long as you to not swap the a to er you are ok with most people
I guess when you are listening to rap or quoting movie lines you are supposed to just skip saying that part..... riiiiiiight.