A description of the loud house music Josh Alb plays in the hallway. It started as a saying people say while he passes by or when someone mentions his name but since developed into to a gang and now even a religion complete with a book of his ideals.
Jeff: Hey look over there! it's Jiggity Jiggity Josh!
It is an utterly bad insult to recieve. It is a similiar phrase to "your mom or you're such a tool." It means "massive mom." If you happen to recieve such a horrible insult please get over it as soon as possible.
You're such a idiot. You freaking mamo. I can't believe you're such a mamo.