A Stinge
A stinge is a washed-up wrestler who used to be cool but now just hangs out with the nerds. And also that kid who failed geometry.
That guy from WCW is a stinge. He used to be awesome, but now he's just sad.
My math teacher is a stinge. He used to be cool, but now he's just weird.
My cousin is a stinge. He used to be popular, but now he's just weird.