Originally used to refer to a cheater in the gentleman's sport of golf from the disingenuous act of picking up one's ball from the green in order to wash it then subtly replacing it closer to the cup. While meant as an extreme insult when people cared about such things, it has maintained its weight by now being used with obscene implications.
v. To organize a group of conspirators to mercilessly comment "ballsack" several times each on a predetermined Facebook status update; generally, ballsacking involves each conspirator liking every comment, including their own.
"Hey, are we ballsacking tonight? Katelyn's got an annoying status that's just begging to get ballsacked."
"Sure. I'll gather some of my friends."
From the Italian - meaning "balls on ya". Ballsagna means to have 1 or more pair of balls on ya at any given time. It's like a tea bagging but it can be on any part of your body. Sometimes at parties, people pass out and others take pictures with balls on the person who consumed too much alcohol.
(You) Hey Jim did you like the party last night?
(Jim) Yeah it was fun, from what I can remember
(You) Well, here's ya one, you remember having Ballsagna forehead?