In the book "Everyday Use" by Alice Walker the narrator reveals that Maggie has low self esteem and has been disfigured. The narrator, who is Maggie's mother, feels that Maggie will be the caretaker of the family's heritage.
A hyperbole is an extreme literary exaggeration. Such as, "I'm so hungry, I could eat a horse!" Obviously one person could not eat a horse, but instead uses a hyperbole to express his/her hunger.