Norman Bates is a good example of one

Usage examples of sicko.

Phil Turkel was Sicko Sicora, his weird facial scars derived from the plastic surgery that hid his real identity from the world.

But he would have guessed where the vampire and the sicko that looked after him went even without the scent that led him through a sewer to a hole in a basement wall and finally into a corridor in the buried part of the city beneath Pioneer Square.

Selim could see how the members of her family could be concerned at the idea of her being out alone with a sicko stalker on her tail.

Go down to your neighbourhood whacko project or sicko facility or scumbag programme and turn yourself in.

I was out of my mind with sobriety, teetotalled I felt lightheaded, I felt downright drunk, eating dinner up here with this sicko who saw nothing in me but myself.

I think they marked me down as a sicko whose sex-plan had boom-eranged, what with the outfit and all.

Eight squillion valentines turned up for me, from sickos all over the world.

Fund the pervs and sickos, while sticking it to the boys who believe in God, country, and morality.