de klik: What does 'geen klik' mean?

Klikken is to click, and in Dutch that includes people: het klikte meteen = we hit it off right away. The noun is de klik, that instant connection where you don't have to try.

The negative is the one you'll hear most. Er was geen klik (there was no click) is the standard, friendly way to end things after a first date: nothing wrong with you, it just didn't click. Everybody uses it, everybody knows what it means, and nobody argues with it. If you get ik voelde geen klik after a date, that's a no.