Finns – чухонцы, чухня. The word чухня is often used in context as nonsense or
I didn't know there were slurs for Finns! I know they call you Russians ryssä (negative connotations).
чухня probably derives from чудь, which was original name for Fennic and Estonian tribes met by Slavs/Russians during their migration northwards. As I stated before in the Finnish thread, Slavs had a technological edge over finnic tribes and managed to conquer them even if heavily outnumbered. So чудь must have been a word to denote their primitiveness. That, and their slow speech patterns which what I hear from my Russian friends cracks you up all the time