Is the expression "wet!" used in street language in The Netherlands if something is awesome? I think I have heard it often but I'm not sure that was what they were saying.
They probably said "vet!", sounds very similar, but not exactly the same.
Is this correct Dutch? Seems very directly translated.
It's a correct and very natural sounding sentence :)
Does this mean that something is against the law in general (as in "the law of England" or "the law of the Netherlands"), or only against a specific law?
In general. So you are basically saying: you are doing something 'illegal'.