fly in the face of something

fly in the face of

To be or act in clear opposition to something else. I can't believe you said something so awful. It flies in the face of everything we stand for! Don't quit now, that just flies in the face of all your hard work.
See also: face, fly, of

fly in the face of something

COMMON If something flies in the face of accepted ideas, rules, or practices, it goes against them. The plan to sell rhino horn flies in the face of the international ban. The Institute flew in the face of accepted opinion and published research suggesting the world may not be getting hotter. Note: The reference here is to a dog attacking someone by leaping or flying at their face.
See also: face, fly, of, something