A person who seeks privacy to do a perverted act; Short for Perverted Privacy; a different phrase/label for someone who engages in voyeuristic activities.
The Pink Floyd song character "Arnold Layne" needed Pervacy to try on the panties he stole from a washing line.
To be perverted, pervy or exceptionally voyeuristic . To become aroused by watching people without them knowing or prying into other people's business.
Old manBaker is particularly pervicin when wondering through the school yard on his morning walks.