Skuballer
Comes from the word "skubala" meaning trash or shit. A skuballer is someone who thinks they're really good at a sport, and gets super cocky and obnoxious, but in reality he sucks at the fore mentioned sport.
Jim: Man, Paul hogged the ball all game.
John: I know! He didn't score once. He's a huge skuballer.
John: I know! He didn't score once. He's a huge skuballer.
Skubal
To relentlessly prove a point
When we said she was wrong, she Skubaled and sent us dozens of links to websites that proved her right.