A timmy is that one kid to break something at a party. He spills his drink at every dinner. If there is fire around, he will put his finger in it. If there is a knife around he will start cutting things.
timmy you smashed the picture!
A cooper is someone that is insane/crazy. Usually has blond hair along with a rectangular head. He also tends to do stupid things all the time. Hes not a bad guy though. Hes nice.
Cooper you put the roman noodles in the microwave without water!