Thomas Jefferson is a real-life former President of the United States of America. Goat formerly had a fear of him; she was afraid that he would pop out of a nickel and fight her, which ended up coming true in "The Chronicles of Cutesachusetts", his debut episode. He later used his nunchuks to beat Lady Primavera Van de Snuggles.
Thomas Jefferson is shown to be violent but noble in the series. He has a disliking for Alexander Hamilton, the 1st United States Secretary of the Treasury.
The series' version of Thomas Jefferson looks similar to the real life version of him. He is a white human with white hair and a black shirt. He also has black lips.