imitation is the sincerest form of flattery

Imitation is the sincerest form of flattery is the figure of speech that is referring to the fact that copying someone is flattering because it shows they want to be like the person they are copying. This phrase is often used in response to the point being brought up someone is copying your fashion style, hairstyle, behaviors or attitude. Instead of being offended by it, you should be flattered because the reason they are copying you, is because they like and admire you.