the.com/voyeur
Someone who turns watching into a hobby nobody invited them to.
means A person who gets pleasure, often sexual, from secretly observing others.
from From French voir, to see — literally one who sees, lurking in the language since the 1880s with curtains half-drawn.
Latin rootVidere, to see, also fuels video and vision.
Not just sexNow used for any obsessive, detached onlooker.
Reality TVAn entire industry built on monetized voyeurism.