The Buttocks
Scholars have said that seeing the buttocks in a dream carries two meanings; if one sees their own buttocks as large, it may indicate that they will gain prominence and acquire great benefit through their wife's wealth. However, if one sees a man revealing his buttocks to the dreamer, it suggests that he will feed the dreamer rich food and benefit him, but then subsequently expose him to adversities or negative consequences.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam
Note: These are traditional scholarly interpretations (ijtihad) drawn from a specific classical source — not a binding religious ruling, fortune-telling, or a prediction of the future.