Source: The Great Interpretation of Dreams (Ibn Sirin)
A skull in a dream indicates the leader of the people or collected money. Breaking it indicates the death of the leader.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
A skull indicates the money that a person saves. Whoever sees himself eating a skull will gain money from a leader.
Source: Signs in the Science of Expressions (Ibn Shaheen)
A skull is interpreted as money. Whoever sees himself owning skulls will gain money.