peeing self
お漏らし おもらし タイツおもらし 着衣放尿 恐怖失禁 おトイレ間に合わなかった系女子
Peeing in one's clothes, as opposed to moving them out of the way first. Typically as a metaphorical depiction of the character being scared of something, or as a part of the humiliation fetish.
See also
This tag implicates peeing (learn more).