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In "Shopping Spree", Mung, Chowder and Shnitzel go to a mall and spend all of the money in Truffle's money box while she is ill. Not only can they not afford all the stuff they bought, but they can't afford the animation and are consequently reduced to live-action footage of the four main voice actors: Dwight Schultz, Nicky Jones, John DiMaggio and Tara Strong in a recording studio. So what do they do? They have a car wash. 
Turn on captions while "The Blackout" is on and pay attention to what the weirdos say.
The tail end of the bluenana episode was pretty hilarious...
Baby Bluenana: (Cough) Mother..? Is that... you? Take me away from theses horrible people! The mother then proceeds to call Panini and Chowder monsters and runs away crying as everyone still has a WTF? face on them.
"Pepper spray? That sounds delicious! (gets sprayed in the face) I WAS WRONG! I WAS HORRIBLY HORRIBLY WRONG!"
This exchange from the Marmalade episode:
Panini: Chowder, get over here.
Chowder: But...can't I have more than one friend who's a girl?
Panini: No. Don't test me, Chowder.
Chowder: ...What flavor lip gloss are you wearing?
Panini: Smackdown. Now get over here.
Chowder: Uh, I think I'd rather stay with Strawbarbleberry...
"Hey Mung! I'm gonna make you pee your pants!"
Mung on the Meaches: "They broke every bone in my body! They even ate my hair!"
The episode where they're making the singing beans, and Mung adds a huge gold clock on a chain, 'For Flava'. That is quite possibly the smartest joke ever made on a children's show.
In the episode where Mung needed to get a Queen Meach for a meach pie, when Chowder, Mung, and Schnitzel are dressed as a mariachi band. The soldier meaches are not impressed and chase them out, and Chowder yells, "NO ME GUSTA!!"
Mung Daal: No! Don't let them tear your arms off! That only makes them angry!
Mung Daal: I've got to do something! (turns on the car radio)
At the end of the episode "Brain Grub":
Mung Daal. It's a long story. Chowder. Does it have pirates in it?
The scene in the Apprentice Scouts when Gazpacho yells at Ceviche for throwing up.
"There's no time for barfing! You've got a badge to earn! What do you think, we're just gonna sit in the bushes and barf all day? Fat chance, pal! FAT CHANCE!"
The scene in the episode "The Heist" where Schniztel, in a desperate attempt to keep Endive unaware there are Sugar Sapphires under her house, kisses her. The people's Reactive Continuous Scream was gold!
A YouTuber's most popular comment on this very video, which makes a whole lot of sense.
CarLoneRanger: College in a nutshell.
Chowder's many attempts to ward off Panini in "Chowder's Girlfriend". Especially the one where he dons a moustache as a disguise.
Chowder (wearing a fake moustache): Why hello Panini. I have a message for you from Chowder. Who I am not.
Panini: Uh huh.
Chowder: Chowder has moved far away and can not be your boyfriend.
Panini: Where did he move to?
Chowder: Uh, down the street to the next city.
Chowder (deadpan): He's dead. Chowder's dead.
Panini: Want a cookie Chowder?
Chowder: Would I!- Aw man!
Comedy Gold! Relationship Comedy!
Chowder and Gazpacho: ...
When Schnitzel goes up to the mic to tell his jokes, he starts, sees Mung, Chowder, and Truffles, and runs through the brick wall.
From "Panini for President":
Chowder: I'm not listening to Gorgonzola. I was just hanging around with him all day because he was giving me food. He's ma' friend.
Panini: Gorgonzola is not your friend. He's, like, a villain or something.
Gorgonzola: (dressed as the phantom of the opera): How's it going Mr. President?
Chowder: Ah! A villain!
Cop: Did somebody say villain?
Gorgonzola: You'll never take me alive, copper! (runs away)
Alot of "Paint the Town".
"Look at me I'm crazy box head man!"
In "My Big Fat Stinky Wedding" Chowder has to sneak into Kimchi's wedding located inside an alligator. When you think that he would use a wrench to knock out Identical Stranger Porridge, but instead trades the wrench for Porridge's glasses. Porridge even wears the wrench in place of his glasses and plays the violin poorly as a result. Chowder then places the glasses on the gator's eyes and uses the altered perspective to somehow enter the gator's nose.
Earlier, Chowder tries to think of a plan to stop the wedding. One montage later, he constructs a Trojan Horse-like thing, and it turns out to be a coin-operated horsey ride!
Endive: Panini, silence the fat one!
Gazpacho: But I didn't say nothin'!
Endive: Not you. The fat, purple buunycat kid.
Bunny-cat: I didn't say nothin'.
Ms. Endive: (holding up Chowder) This one! Silence this one!
The first minute of "The Toots" pretty much acknowledges three things: the show's need of made up items, the show's name, and the basic formula of Chowder eating the Food of the Episode (the Tooten Fruit).
Chowder: So what are we making today?
Mung: Oh, just some bread.
Chowder: But that doesn't sound like a fantastically whimsical Marzipanian dish at all!
Mung: Good point. Let me find something made-up to put in it. (pulls out the Tooten Fruit) Here.
Chowder: Oooooooh, what is it?
Mung: It is a Tooten Fruit. They're full of gas and when they expand, they make the bread rise, just like yeast.
Chowder: Oh. But why don't we just use yeast?
Mung: Because this is Chowder!
Chowder: But I'm Chowder.
Chowder: So, now what?
Mung: Well, I should tell you not to eat it.
Chowder: And I eat it anyway. Right?
Mung: Yep. Here. (Puts the Tooten Fruit on the table, before turning around) Now I'll turn around, and pretend to be oblivious.
The song in the Christmas Episode.
Chowder: And now the roof goes on and nothing can go wrong. (gingerbread house falls) OH NO IT ALL WENT WRONG!
From "Schnitzel Quits" after Schnitzel goes to work for Endive...
Panini: What's his favorite food? What's his favorite color? What's his favorite cartoon? I bet it's "Chowder"!
From "The Hot Date":
Mung Daal: Yeah, sometimes I got to beat the ladies off with a stick! (Scene cuts to Mung literally beating Truffles off with a stick) Back, woman! Back, I said!