What does it mean when you dream of eating a family member's finger?

This dream could be a literal illustration of a figurative expression. It might be an expression of playful affection, as in Maurice Sendak's children's book, Where the Wild Things Are, "I'll eat you up, I love you so!" Or, it might illustrate an angry rebuke, "Point that finger at me, and I'll bite it off!" In either case, the dream is a literal image of a metaphorical expression.