Bingo Bongo. Used in place of a word you don't feel like saying, mostly to let everyone know you're about to slip into crazy mode. For example: "Oh, It's time to brush my teeth", becomes "Oh, It's time to brush my bingo bongo". Follow with insane laughter.
T-Wubbity. Use this word like you would use the word "Geronimo!". It's perfect for yelling right before you jump on your Dad's kidneys with your hard sole shoes.
Knee-dy. This is the word you yell when you have gone completely insane, and no amount of consoling or reprimanding will get you to settle down and go to sleep. It is best accompanied by entering "ragdoll" mode, all muscles going completely floppy as you flip around the bed, injuring yourself and others.
and, a new addition, as of yesterday... Rocketdog. I'm not entirely sure what this word means, or even if I got the syllables right, but by using context clues I know that this is a phrase you screech at full volume, louder and higher pitched than you have ever yelled before. It is only used when you want to scare off a stuffed animal that you're pretending is a monster. It's apparently also very hilarious, because you always follow it with an uncontrolled burst of laughter.