[geuis]

Or or Kut?

[jeroenhd]

Kut, meaning something like "fuck" or, more literally, "cunt", but in terms of offensiveness it's closer to the Australian context of "cunt" than the American context.

https://en.wiktionary.org/wiki/kut#Noun_4

I don't think the name would be that much of a problem given how often the word is thrown around informally.

[GekkePrutser]

Saying it in public is one thing. Using it in branding that you want users to associate with is another.

[brink]

Well then it should be super popular.