A newer form of saying "Fuck You", often found in the gaming community. The word was first spoken publically in a Jedi Knight: Jedi Outkast server. A player had said "Fuck You" and was asked to watch their language. Another player then remarked that he should say "Fudge You" instead so that he would no longer be yelled at for swearing. Finally, a player most well-known as BigPapaJ, decided to take it one step further commenting that "Fudge You" is also known as "Fud j00". And thus "Fud j00" was born.

A casual invitation / threat used by an individual that is not afraid of fucking someone up.