Mooning is the act of displaying one's bare buttocks, by removing clothing. Very often, poeple also bend over, and their genitals may be visible as well. In English-speaking countries, mooning is used to show protest, or disrespect. It can also be done as a form of provocation. Mooning can be done for shock value, for fun, as a joke or as a form of exhibitionism. The Māori have a form of mooning known as whakapohane that is a form of insult.

Illustration of a woman raising her dress and mooning a nun (1905)
Mermers of Ukrainian Group FEMEN demonstrate against something their president said, that was disrespectful to women. They show their disrespect by mooning.

In some countries, mooning is seen as a form of indecent exposure. This often depends on the context.