UPSKIRT

Etymology

Adjective

upskirt (not comparable)

Designating a voyeuristic image of the view up a woman's skirt.

Noun

upskirt (plural upskirts)

An image of this kind.

The area inside a skirt, most commonly from below and while being worn.

Verb

upskirt (third-person singular simple present upskirts, present participle upskirting, simple past and past participle upskirted)

(transitive) To take a voyeuristic photograph up the skirt of (a woman), especially surreptitiously.

Source: Wiktionary