Bartholomew "Bart" Simpson is voiced by Nancy Cartwright (that's right, a woman!) and is Homer and Marge's only son on The Simpsons.  Bart is an underachiever and was definitely much more of a bad boy in th ebeginning seasons of the show.

Now, Bart, although he has not aged, has certainly matured as a character.  Do the Bartman people.

Bart Simpson Quotes

Bart: Moe, look over there! (as a distraction)
Moe: What? What am I looking at? I don't see nothing. I'm gonna stop looking soon What? What, is that it?
Homer walks into Moe's Tavern
Homer: Hey Moe, can I look, too?
Moe: Sure, but it'll cost ya.
Homer: My wallet's in the car.
Homer runs out
Moe: He is so stupid. And now back to the wall.

Bart: The burglar even took my stamp collection!
Lisa: You! Had a stamp collection!? (everybody laughs *phone rings*)
Nelson: Stamp collection!? Haha!

The Simpsons Quotes

(To the tune of "Baby Got Back.")
I like big guts and I cannot lie
Double chins with the chafing thighs
When a dude walks in with the hanging jowls
My stomach starts to growl--I'm gettin' hungry
So I masticate, chomping on the overweight
I eat fat people for days
Like potato chips by Lay's
Try to eat just one, but it can't be done
I've got to eat a ton
Baby likes fat
Baby likes fat

Sir Mix-a-Lot

Dearest Edna, I must leave you. Why, I cannot say. Where, you cannot know. How I will get there, I haven't decided yet. But one thing I can tell you, any time I hear the wind blow it will whisper the name Edna. And so let us part with a love that will echo through the ages. ---Woodrow

"Woodrow"