Ignore him/her. Most likely they want attention and when you ignore them they will move on. Do not say anything or respond in any form to what they do.
Odds are... never. They'll annoy you as long as they want. So, the best way to get rid of them is to punch them in the f-ing face.
You get rid of a annoying flea mite by hitting it so hard that it starts to cry and cry
Caillou
just go away
Push him off
throw it off a skyscraper, won't be annoying after that.
Try being a less annoying niece.
Say that you love him. He probably has a crush on you.
Everybody Loves Raymond - 1996 Annoying Kid - 7.8 was released on: USA: 11 November 2002
Don't use that company or store
Punch her in the tummy.