A convenient contraction of the two words balls and
itch. The male genitalia is one of the most optimum places on the body for bacteria, parisites, and fungi to flourish. Some of these things cause the tesitcles to itch. When this occurs, it saves
time to simply say "Ballzitch" and
scratch your testes until alleviated rather than have your friends ask, "Were you just playing with yourself?"