Full Name: Charles Ruttheimer III
Current Age: 18
Current Vocation: Graduate of Lawndale High
Season One Age: 16
Season One Vocation: Sophomore at Lawndale High
Parents: Charles Ruttheimer, Jr.
First Appearance: The Invitation
Upchuck is a person that raises being a geek to an art form. He's also sleazy to the Nth degree, and is thoroughly convinced that he's God's gift to women. Upchuck's standards are only slightly higher than his success rate (which is at absolute zero); he'd be sued for sexual harassment if he weren't such a waste of effort. His catch phrase is "Rrrrrrr, feisty!" Listen for it, and be afraid... be very afraid...
Upchuck's voice is performed by Marc Thompson, who also does the voices of Kevin, Jamie, Mr. O'Neill, and Mr. DeMartino.