Source: The Great Interpretation of Dreams (Ibn Sirin)
Black pepper in a dream is unlawful money. Eating it indicates worry, grief, and severe dispute.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
Black pepper indicates a slandering man of bad character. Seeing it indicates hearing ugly speech.
Source: Signs in the Science of Expressions (Ibn Shaheen)
Black pepper is interpreted as severe worry. Whoever sees himself eating it will be afflicted with severe worry.