Kearney Zzyzwicz is one of the school bullies and is a part of Nelson's gang, but is way too old to still be in school.  Kearney is in his twenties and even has a son named Little Kearny and a wife he's referred to.  Maybe one day he'll graduate elementary school.

Kearney Zzyzwicz Quotes

Lisa: You punks are about to get a taste of your own medicine, this is my brother and he knows karate!
Jimbo: Oh, we're real scared!
Kearney: Please don't hurt us Bart!
Dolph: What are you gonna do? Throw your diapers at us? Haha!
Lisa: Yeah just keep laughing, you know it makes him madder! Come on Bart, start em off with the touch of death, and go from there!
Bart: I think they've learned their lesson already
Jimbo: No! We wanna see the touch of death!

Jimbo: No matter how dead their relationship seems, all parents eventually commit the heinous acting of love.
Kearney: Mine do it once a year on the magical day when the prison and the insane asylum have their annual mixer.

The Simpsons Quotes

The Constitution? I'm pretty sure the Patriot Act killed it to ensure our freedoms.

Bart

Homer: (Wearing glasses) The sum of the square roots of any two sides of an isosceles triangle is equal to the square root of the remaining side!
Man: (From inside a bathroom stall.) That's a right triangle, you idiot!
Homer: D'oh!