It means "fuck me" (repeatedly) in Slovenian :) But I guess if Ford* can't be bothered to check it's car names that a small startup will be even less likely to do it.
If it's supposed to be Japanese, it would be pronounced key, not kai. I'm not sure if it even means anything, though. GIS makes it appear that フキメ may have something to do with fishing lures, but it's not in my dictionary.