What is Neuken?
1.
To fuck, make love.
Also: verneuken, which means to fuck up
Ik ga je anaal neuken vanavond, means, I will do you in the butt tonight.
See
2.
To screw. Mess with. Dutch use it most often in casual manner, though now famous in Europe as well.
Neuken in de keuken met mien Schatje. - Dutch. , Don't ever neuken with that pussy.