When one person intentionally ruins another person's dreams or takes away some happiness. Similar to "rain on my parade," but to do it intentionally and perhaps with malice.
What do you mean you don't think I'm smart enough to get into Harvard Law? Man, don't pee on my parade!
Or
You ate the last cupcake? I was looking forward to it all day! You peed on my parade!
Or
You ate the last cupcake? I was looking forward to it all day! You peed on my parade!
by JavaJaneOhio July 9, 2010