When something goes wrong and it's all your fault, it's an excuse to try and rid yourself of any blame. This comes from the 2010 FIFA World Cup where the game ball, named the Jabulani, has been the target of complaint by goalkeepers and players alike to cover up poor play.
Pissed Guy: Dude, you just rear-ended my car!
Other Guy: It wasn't my fault, it was the Jabulani.
Teacher: You just failed the last test. Did you just not choose to study?!
Student: I studied all night. It was the Jabulani.
English Commentator: Bloody hell, Rob Green just let in an easy goal! He's a very skilled keeper so it must just be that Jabulani