Robert Jeffrey "Bobby" Hill is the tritagonist of the series. He is the only son of Hank and Peggy Hill. Bobby's age changes gradually throughout the series. Up until Shins of the Father he is 11, then 12, then 13. It's been said in later episodes that Bobby is about 14 years old.
Bobby's jokes also end up getting his ass kicked by Hank. Bobby hates propane compared to Hank. Bobby also gets swirlies from people and people make fun of him.
Robert Jeffrey " Bobby" Hill is a child from Arlen Texas.
While in Italy in "Boopa-Dee Bappa-Dee", Peter Griffin attempts to use the guide on the television remote, turning Stewie into a host of past and present Animation Domination characters including Bobby.