Anything you want. It's just one of those words that you can use for anything...a bit like 'Hakuna Matata' from the Lion King.(Pronounced 'Yacker-ba-cackers')
A weird word I heard from a gameshow in the UK. It is somtimes used to be refer to the wordcrackers. It is a word usually used to insult something or someone. Also used as a word for bollocks