If you have no dog in a fight, you are not concerned and will not be affected either way by the outcome of something.

Once upon a time, when men and women bred dogs to fight, and bets were and drinks were flowing freely, there were moments when they would ignore the dog fights. When asked why, “I don’t have a Dog in this Fight”. Since they didn’t have any of the livestock involved, most would just ignore what was going on. My Grandfather raised some fighting dogs at one time, until he took me to a fight. I was about 4, and I just didn’t understand all the fascination the grownup’s had for watching dogs chew each other apart. Especially since I used to play with a lot of them. As a little guy, it seemed even the meanest dog would play with me.

A: “Are you going to watch the big game tonight?” 

B: “Nah, my team’s not playing, so I don’t have a dog in the fight.”A lot of people think the tax proposal only affects large multinational corporations, but many small business owners will end up having a dog in the fight.You don’t have a dog in the fight, so why do you care about the outcome of this lawsuit?