My girlfriend thought she was sticking up for me when an arguement between my grandson and myself took place, when she sent him a text my grandsons mother (my daughter) got mad and told my girlfriend "your dogs not in this fight", my girlfriend I believe mistook this to mean my daughter was calling her a dog or a bitch, which I don't believe to be accurate, can anyone please help me by telling me what that saying means? I hear it's a really old saying that I understood means for someone to mind their own business, again I ask to please help it's causing quite a problem which I think is ridiculous. Thank You