Somebody who has a penis that isn't as large as it should be for their race, or an insult that just generally throws somebody off balance and catches them by surprise.
Shut up, cracker dick!
Man, Jaykwon's girlfriend said he's a cracker dick.
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi