The act of being one's filter for bitch-ness: taking the blunt of all of a person's (although not refrained to, see bitch) bitchy personality or "venting" so that they can become a normal person for someone they do not wish to be a bitch to.
I'm sick of being your goddamned bitch filterJordan, you only do this so that you feel better about yourself for not being an enormous bitch to your actual boyfriend.
It is said of the situation where a person has the bad luck to make contact with his testicles against an undefined surface or object, intentioned or not.
Given the nature of the word, it is more appropriate to design cases where the interaction is made with a moving object, for example, a ball.
Although it is extremely painful for the victim, it tends to be considerably funny to people who witness it.
Today in the baseball game the pitcher took a nutshot; the baseball hit him in the nuts.
Man, I just watched the funniest nutshot video ever.