A white boy who is very ghetto. He hangs with black people and knows every type of drug. Although he may be one of those wannabe Smack Cracka. Also see *Wigger*
A myocardial infarction brought on by the act of simultaneously hitting cocaine and heroin (commonly known as a speedball). Rhyme for effect.
My buddy John was hitting the speedballs one after the over, then all of a sudden, he collapsed to the ground, clutching his chest. It was a smack crack heart attack.