英语中双标狗可以说成double standard dog。

"Double standard dog" is an English idiom used to describe someone who exhibits hypocrisy or unfairness by applying different principles or standards to different situations or people. The term "double standard" refers to the existence of two different sets of rules or judgments that are applied selectively, often to one's own advantage or to justify one's own actions while criticizing others.

Using this idiom, you can say that a person who is a "double standard dog" is someone who is not consistent in their behavior or judgments, and who holds others to different standards than they apply to themselves. This can be seen as a form of prejudice, discrimination, or unfairness, and is generally considered to be a negative trait.