Used one time after a person says something silly, goofy or corny, or behaves in a similar way.
Or, on a regular basis, to describe someone who says things or behaves in silly, goofy or corny ways repeatedly.
Term of endearment or affection used for someone significantly younger than the speaker. Particularly useful when the younger person has been acting in a superior way and needs to be reminded that he really is still young.
Comparable to the Star Wars phrase "my young Padawan"
You don't know what you're talking about this time, Young One.