Can you tell us a really really really funny joke?

there was three boys walking along one day their names were shut-up, manners and poo. Poo fell over and shut up went to get help, he knocked on a old lady's door and she said " Hello can i help you?" poo said yes and that his brother had fallen over up the road and needed help so she asked what his name was and he said shutup so the lady said how dare you! and where is your manners? shut up replied, up the road picking up poo