Upskirt voyeur
From Voyeurweb's Wiki about Sex
The upskirt voyeur is a voyeur specialized on upskirt voyeurism doing upskirt photos, which basically means to look up her skirt as well as to shoot photos up her skirt. The upskirt voyeur is also called upskirter. Upskirt voyeurs are focused on legs, thighs, ass and pussy. Detailed articles are under upskirt voyeurism and upskirt.
Typical photos done by upskirt voyeurs:

