Foreign Rancid Chocolate is a Persian treat that Missy gave to Sam in iReunite With Missy, that was expired way before Sam was born. The chocolate is also known as "The Expired 1992 Stomach Bomb" because the expration date was on July 13, 1992. Sam got sick from eating it. It was part of Missy's devious plan to get rid of Sam so that Missy could have Carly all to herself. Sam said the chocolate was older than The Fresh Prince of Bel-Air.
Persian chocolates in the western worldEdit
Exactly how somebody from the western world could obtain such chocoates is unclear, sincve the United States and much of the western world has had sanctions aganist Iran since 1979 Islamic Revolution, partially due to their support radical Islamics outside of the country such as the Hezbollah. Considering thathe expiration date was 1992, they were either produced in Iran, during as period of attempted economic reforms that pre-dated the better know reform movement of 1997-2005, or they could've been produced by Iranian exiles.