Grossities: noun. Disgusting things children do that they think are really great.
While drinking a cup of iced tea today, Monkey Son #1 coughed and the tea came out his nose. He seamed a little upset at first, so I tried to calm him by smiling and saying, "Did that come out your nose? Eww!" and laughing. Sadly, he thought that meant this was a really neat thing to do, and tried to convince Monkey Son #2 to do the same. Fortunately, Monkey Son #2 is too young to understand what he was asking.