Geno Smith has a bad temper. That isn't meant to throw shade at the former Seattle Seahawks quarterback. His history in the NFL proves that. He got into fisticuffs with a player with the first team that drafted him, the New York Jets. With Seattle, Smith would often show his displeasure on the sidelines with a player he thought caused a mistake.
Smith has often let his emotions get the better of him, and almost always for the worse. He also seems to lack the self-awareness of how his actions will be viewed. During the Raiders and Seahawks preseason game this season, Smith raised his middle finger to a 12 who was holding up a sign he didn't like, for instance.