the activity, illegal in some places, of taking a photograph or video from a position that allows someone to look up inside a woman's dress or skirt, without the woman's permission

The term "upskirting" refers to people using cell phones or any small camera to surreptitiously take pictures up women's skirts. “upskirting”指的是用手机或小型照相机偷拍女性裙底照片。