The act of, "dumping" your saddening feelings to others, causing you to feel like it was worthless to say in the first place and move on to another topic a second later.
{Person 1} "Sometimes I wonder why I can't help people. People won't come to me for help when they feel terrible, everytime I try to be positive, I end up going into the negative instead-"
{Person 2} "Wow, he's going through a hard pity dump..."
{Person 3} "Don't worry. He'll probably be better after."