A Super Duper Senor is someone in their 6th+ year of high school. After failing your Super Senior year, you are then referred to as Super Duper Senor. Please note that "Senior" is spelled wrong, because that's how stupid you are if you earn that title.
Guy #1: Dude, if Bill fails again this year, he'll be a Super Duper Senor.
Guy #2: Yeah, I know a lot of cool Super Seniors, but if you make it past that, you're pretty lame.