Mama is obviously not referring to his mother but maybe god or some other thing idk, the badge is probably his identity, or what others see him as and him wanting to change this "badge." I think its about him wanting to stop violence and getting too far into the bad stuff in life and feeling like its dragging him towards death and hes knocking on the door of heaven. Tommyboy220's thing about the phone call, the comment right above this one, is exactly how I interpreted it. Either everything I just said or he was stoned when he wrote this song.