bat for the other side

1. To play for or support, either secretly or openly, the opposing side in a given contest or debate. Refers to cricket and baseball terminology, meaning to be a batter for the other team during a game. While the senator continues to publicly denounce the proposed tax law, many feel that he is really batting for the other side. I was hoping to be on the same team as all my friends, but we didn't have enough kids to make two full teams, so I had to bat for the other side. I think Rich is really trying to sabotage the deal. Could he secretly be batting for the other side?

2. euphemism To be attracted to or have sexual relations with people of the same sex; to be homosexual. I asked Simone out on a date, but it turns out that she bats for the other side. I'm not looking forward to telling my parents that I bat for the other side. Jim is dating Elise? Oh, I thought he batted for the other side.