Punt-tard
A Puntard is a gambler who thinks he knows how to gamble/punt but couldn't pick a winner if it was a booger in his nose.
"Hey guys, throw a hundred on this horse, there's no way it can lose"
"Shut up you Punt-tard, it was the only horse in the race and still managed to lose"
"Shut up you Punt-tard, it was the only horse in the race and still managed to lose"