Al-Nabulsi said that, however it occurs, despising or belittling someone in a dream signifies evil and ugliness. Belittling a believing and righteous person signifies corruption and deficiency in religion, and there is fear that the dreamer will fall into humiliation.
Seeing an unknown young man belittle the dreamer signifies victory over an enemy. If the one doing the belittling is an unknown old man, the dream signifies poverty, because that unknown old man represents the dreamer's work and effort.