1. When you are brained (grabbing your nuts and squeezing them so they resemble a brain and shoving them in someones face)by multiple people at once.
2. The performance of said act.
1. So I was sitting there making out with my chick when I looked up and Larry was braining me so I turned my face only to be confronted by Kurt's nuts.
2. When Larry passed out, the guys and I gave him the brainstorm of the century.