vulgar slang A rude exclamation of contempt, disregard, or general disrespect. Primarily heard in US. You can kiss my ass, Jerry! There's no way I'm helping you after the way you treated me and my family. They can kiss my ass if they think I'm going to start coming in on Saturdays to work. A: "I hear Janet is pretty upset about what you wrote." B: "Yeah, well, she can kiss my ass."