A display between two people to show that some act of genious/awesomeness has just happened. This is said verbally between the two persons. They can also clench a fist and knuckle tap each other whilst saying it for extra affect!
It can also be used when two people say the same thing at the same time.
Vixter- "Iv just had an awesome idea!"
Vixter- "Lets watch Kenan and Kel"
(Both together) "Boom-Boom"
An act of defecating in a diaper or undergarment. Used by Homer Simpson in episode CABF04 ("Homer vs. Dignity").
"Baby made a boom-boom!"