Upskirt is a slang term usually referring to up skirt photography, images of the view up a woman’s skirt (as seen from underneath), including shots of a woman’s underwear, or exposing her vulva or buttocks. Alternatively, an "upskirt" may be a video, an illustration, or simply a view.

While upskirt images may be captured consensually, many viewers seek such images taken surreptitiously (and presumably without the subject’s consent). The creation and viewing of this type of upskirt are a form of voyeurism. The advent of cell phones fitted with cameras (a.k.a. camera phones) is often credited for the surge in this type of photograph.