Danny gets two in "Lucky In Love," after Shadow throws a lightning rod into a car, impaling the roof:
Danny: Optional sunroof. Nice.
In addition to when he and Johnny are pretending to fight to fool Kitty, and Danny delivers a particularly painful punch to Johnny's nose.
Johnny: I thought this was supposed to be a pretend fight!
Danny: Then pretend that didn't hurt! *punches him again*
Jack's belief in Santa Claus during the Christmas Episode had him building an entire landing point decorated with related holiday goodies on top of the Fenton Opt Center with a glaring arrow sign that reads, "This Way, Santa" just for Santa's sleigh.
This little ditty from "Doctor's Disorders":
Jack: "Why should we trust you?
Bert Rand: "Because I'm with the government and I can audit your taxes if you don't."
Jack: "... We trust you."
In "Reign Storm", when the Ecto-Skeleton is draining Jack:
Kindred Spirits proved even Vlad's holograms - well, at least the Maddie ones - didn't like him, in another CMOF:
Holographic Maddie: Going critical... Losing coherence... And I never loved you. I love the Jack program.
Holographic Jack: [slides onscreen and puts an arm around the holographic Maddie. He waves.] Vladdy!
Speaking of Vlad's holograms, in the Grand Finale, two copies of holo-Maddie have a cat fight over who gets to inform Vlad of some good news, complete with computer based insults at each other. Sadly, we don't get to see the whole thing.
In "What You Want,":
Tucker: You just had to save the day, didn't you?
Danny: Um, yeah, because a car smashing into the 28th floor of anything is BAD!!!
And then the Surfer Dude calling Danny and Tucker "hallucinations".
What, no love for "Dude, you are one seriously-crazed-up fruit loop"?
Or its response?
Vlad: "A fruit loop would not have been able to make his first million on a series of invisible burglaries. A fruit loop would never have thought to overshadow enough millionaires to become the richest man on the planet. '''''I. AM. NOT. A. FRUIT. LOOP!'''''"
After the Ghostwriter is defeated (because he couldn't find a word rhyming with orange), the following exchange happens:
Walker: [holding an orange] Orange?
Ghostwriter: Get that thing away from me!
Paulina's line in "Memory Blank":
Paulina: She surrendered her individuality for a boy, I'm so proud of her!
The photo montage when Danny gets his memory back. Dynamic music is playing during all the photos of Danny fighting ghosts. Then it suddenly changes to a picture using intangibility to sneak in and out of the girls locker room complete with cheery music. It was even funnier the second time the photo was flashed.
This little bit, courtesy of Vlad Plasmius and Danny Phantom, from "Torrent Of Terror"-
Vlad: Uh, no. I was just going to introduce you to a friend of mine. Danny, this is Vortex. Vortex, Danny. Well, gotta fly...Ta! (Flies off).
Danny: (Deadpan) My hero...
"GIMMIE A "V"! (Beat) Someone's going to give me a "V" or there's gonna be trouble..."
And earlier in the episode, we get this bit of dialogue between Vlad and Vortex:
Vortex: Did people tell Piccasso to stop painting the Mona Lisa?
Vlad: That was Da Vinci, you dolt.
Also, throughout the episode, Danny zapping Vlad with lightning, cyclones, and other weather whenever he gets angry.
Tucker: Look on the bright side, Danny; until we get back, he's going to have to cater to your every whim and desire.
Sam: Yeah, he wouldn't want to make you angry.
(The two smirk evilly at at Vlad, who looks back slightly worried)
Danny: *evil grin* This pleases me.
"Secret Weapons" proves Jazz isn't the only one with a victory dance when Maddie shakes her thang after winning against Jack on checkers.
Maddie: Nobody likes a sore loser, Jackie!
"Boxed Up Fury" has a great one:
Jazz: Eat my fire, dragonbreath! [shoots Fenton Bazooka]
Maddie: Ten heads, meet nine tails! [whips out the Jack o' Nine Tails]
Jack: I DON'T HAVE A CLEVER QUIP! [shoots gun]
More or less everything Poindexter said in "Splitting Images" was a CMoF. One of my favorites was when he responded to Sam's question (While in Danny's body) about where Poindexter went with "Oh, that square? He flew the coop, perrr-manent like." What makes this even funnier are his hand gestures and the looks on Tucker and Sam's faces.
This bit from "Maternal Instincts"....
Danny: Bye, Vlad! And as a lonely single man in your 40's, might I suggest internet dating... or a cat!
Another one from that episode is Maddie running through the house trying to find a phone while Danny fights Vlad, opening doors to find cars, ATVs, and a helicopter and not noticing them because she's so busy. After she comes back in to where Danny and Vlad are, she's in the middle of talking to him when she finally realizes it.
This bit from Reign Storm.
Valerie's Dad: (walks in on Danny in ghost mode and Valerie in her hunting costume arguing with each other)What is going on here?
(Both stare at him)
Valerie: (turns and points at Danny) You're not the boss of me!
Danny: (Rips off Valerie's mask, exposing her identity; Valerie screams in surprise) No, but he is!
Valerie's Dad: Valerie?!
Valerie: (screams, then turns to Danny) You are so dead!(lunges at him but is stopped by her father).
Valerie's Dad: You've been hunting ghosts? Are you okay?
Valerie: I...I'm fine.
Valerie's Dad: (Puts her down)THEN YOU ARE IN SO MUCH TROUBLE!
And the fact that it was used again in "Memory Blank".
Danny and Sam flying into a giant cutout of Ember whilst distracted by one another in "Fanning The Flames" ("Flying's... nice. (SPLAT!) Falling stinks!"), and earlier Lancer's over-the-top excalmation:
Between Dash and Danny, when Danny's trying to rally the students against a ghost invasion:
Dash: Why should we listen to you, Fen-turd?
Danny: You're right, Dash. Let's ask the other kid who comes from a family of ghost hunters and knows how to use all their equipment. (Beat) Yeah, that's what I thought. Now who's with me?
Danny and Tucker fall asleep and end up snuggled together. They wake up that way, scream, and yank their arms back.
"MY NAME IS ELLIOOOOOOOT!"
When Sam and Tucker spy on the Guys in White in "Livin' Large", they end up getting found out and handcuffed to a pole. This leads to one of the only funny lines of Sam's that actually sticks in this troper's mind: "You can't do this to us! I know the law! I read a graphic novel version of the Constitution!"
Likewise in that episode, the Guys in White continually trying and failing to use the Fenton Works technology.
Danny venting at Jazz's incompetent attempts to help him fight ghosts is hilarious.
Jazz: That was good work tonight, Danny. We caught three ghosts.
Danny: No, we caught one ghost three times, all of them ME!
"I ask you again...YOU GOT A PROBLEM WITH JUMPSUITS?!"
"I WILL DESTROY YOU!" *squish*
in Frightmare, when Danny possesses Dash in Sam's dream, declares Dash to be Danny Phantom, and then Goes Ghost inside of Dash in order to wake Sam up.