The kind of thing useless adults will say to a Kid Hero or child who has some rather urgent news. This pint sized Cassandra will be shooed away from grownup company for being "Just a Kid" before even getting one word out. This isn't necessarily limited to just children either; a pretentious character can silence a friend or underling in this manner, or a grown woman when the men don't take women seriously. This can also be used as a put down to annoying characters when two more powerful/important characters are discussing something. The kid will get interrupted after the word "but".