A Weevilton
A Weevilton is someone who never gets anything wrong and will tell you they're right even if they're not.
At lunch: Weevilton says the pizza is bad. Everyone else eats it. Weevilton says, 'I was right.'
Text: 'You didn't do your homework. Again. I told you to do it.'
During a game: Weevilton loses. Then says, 'I just had bad luck.'