If your girlfriend calls you a skinny dog, if it is a joke, then you can jokingly ask what kind of dog you are, or ignore it. If it is serious, then I suggest you give up and leave, don't be shameless and annoying, no matter How to raise a dog? Using a dog to describe a person is a bad word.

Many people can’t tell the difference between a mangy dog ​​and a bulldog. A mangy dog ​​has more and deeper facial folds than a bulldog, and Mangy dogs also have wrinkles on their bodies, but bulldogs don’t. Mangy dogs’ ears droop downward, while most bulldogs’ ears are upright, and bulldogs’ tails are coiled around their buttocks, while mangy dogs’ tails are straight.