From When You Dish Upon a Star:
"And when it's time to do the dishes, where's Ray Bolger? I'll tell ya! Ray Bolger is looking out for Ray Bolger!"
From Bart Carny:
"You wrecked Hitler's car. What'd he ever do to YOU?"
From Grade School Confidential:
"Stop pushing me. What's going on?"
"Just enjoy the movie, it has Tom Berenger."
And later in the same episode, one of my favorite Agnes moments:
Agnes: I collect pictures of cakes that I clip out of the magazines. It all started in 1941 when "Good Housekeeping" featured a photo of a lovely cake.
Bart: You wouldn't happen to have any real cakes around here, would you?
Agnes: Oh, my, no. I don't care for cake, too sweet. Now, this is called a Lady Baltimore cake. At my age, I don't have much saliva left, so you'll have to lick my thurab before I can turn the page.
Bart: Oh, can't I just turn the page for you?
Mrs. Skinner: (slaps his hand) No!
From Girly Edition:
"Well, you're not taking any time out of my show. It's jammed up as it is. There's a monologue, those idiot puppets, Krusty's nap time, the second monologue, Paul Harvey, Senor Papino, I tell ya, it's the tightest three hours and ten minutes on TV!"
From Lisa's Date With Density:
"WILL YOU TWO SHUT UP?! PEOPLE ARE TRYING TO SLEEP!"
From You Kent Always Say What You Want:
"Daddy, what are you doing?"
"Imploring people I never met to pressure a government with better things to do to punish a man who meant no harm for something nobody ever saw, that's what I'm doing!"
"...Daddy, we think you need a new mommy."
"First things first!"
From Worst Episode Ever:
"Oh, look, you're getting cranky. You haven't had your juice."
From Two Bad Neighbors:
"Where'd you get those pajamas?"
"They're presidential pajamas. You have to be President, and you're not President!"
"Yes I am."
"No, you're NOT! BAR!"
From Bart the Fink:
"I'm sorry, but I cannot divulge information about that customer's secret, illegal account. (hangs up) Oh, crap. I shouldn't have said he was a customer. Oh, crap. I shouldn't have said it was a secret. Oh, crap! I certainly shouldn't have said it was illegal. (sighs) It's too hot today."
From Bart's Inner Child:
"Oh no, you DON'T! That trampoline is MINE!!!" (rams a car backing out of the driveway)
From The Boy Who Knew Too Much:
"Justice is not a frivolous thing, Simpson. It has little, if anything, to do with a disobedient whale. Now let's vote!"
From Bart Gets an Elephant
Homer: "Uh, Milhouse saw the elephant twice and rode him once, right?
Mrs. Van Houten: Yes, but we paid you $4.
Homer: Well, that was under our old price structure. Under our new price structure, your bill comes to a total of $700. Now, you've already paid me $4, so that's just $696 more that you owe me.
Mr. Van Houten: Get off our property."
From Lard of the Dance:
"The thing about huckleberries is, once you've had fresh, you'll never go back to canned. (Principal Skinner walks up) Um... uh, so anyway, I kicked the guy's ass. (Skinner noRAB and leaves) Now, if the berries are too tart, I just dust them with confectioner's sugar."