Stewie: All right, Brian, we'll go. But don't touch anything while we're there. Even stepping on a mosquito can cause a chain reaction that drastically alters the present.
Brian: Really?
Stewie: Nah. You can do whatever you want.

Hitler: These filth are making a mockery of our Reich! Execute them! [the solders cock their guns, ready to shoot them, but Hitler interrupts them] Unless...
Brian: Unless what?
Hitler: Unless they can sing a charming musical number.
[Stewie and Brian smile at each other as music starts playing. A pair of hats and canes are tossed at them]
Stewie & Brian: Whenever-
Mort: [stands on the return pad] Damn it, will you two just get in the fucking time machine?!

Stewie: Hey, New Brian. Oh, I see you're having pie. You know, pie isn't really pie without Cool Hwhip.
[Stewie doesn't get a reaction from New Brian.]
Stewie: Everything's better with Cool Hwhip.
[Still no reaction.]
Stewie: Did you hear what I said?
New Brian: Yeah, what about it?
Stewie: It doesn't bother you the way I pronounce it? "Cool Hwhip?"
New Brian: No, why would it?
Stewie: Cool Hwhip. I'm putting emphasis on the H.
New Brian: Sounds right to me.
Stewie: Nothing ever bothers you, does it?
New Brian: No, not really. I like everything.
Stewie: God, he's a bigger buzz kill than Buzz Killington.
[Camera widens to reveals Buzz Killington sitting on a recliner next to Stewie and New Brian]
Killington: Stewie, do you know why W. S. Gilbert was frequently drunk on his transatlantic crossings?
Stewie: No...
Killington: Because he was quartered on the port-side! [chuckles] Now that I've got you, let's both revisit the birth of the D'Oyly Carte Opera Company.

Brian: What's it called?
Stewie "Susie".
Brian: [sarcastically] Wow, a song named after a girl. There aren't a million of those already.
Stewie: [annoyed] Name twenty!
Brian: "Rosanna", "Roxanne", "Michelle", "Allison", "Sarah", "Angie", "Brandy", "Mandy", "Gloria", "Cecilia", "Maggie May", "Jessica", "Nancy", "Barbara Ann", "Billie Jean", "Layla", "Lola", "Polly", "Helena", "Jenny from the Block".
Stewie: Name six more.
Brian: "Sherry", "Laura", "Wendy", "Maria", "Peggy Sue", "Minnie the Moocher".
Stewie: Name five more.
Brian: "Tracy", "Jean", "Jane", "Mary Ann", "Eleanor Rigby".
[Short pause; Stewie then throws his guitar on the floor and walks out]
Stewie: Go fuck yourself.

Brian: Oh, there's my laptop. Do you mind? I want to check my e-mail.
Stewie: Go away! I'm editing this music video I'm making for Susie.
Brian: [voice rising in pitch] Oh, really. Music video? Working on a little video there? Little, uh... little music video? Little compilation of visual images to go with the song? Little four minute movie that tells the story of a...
Stewie: Yeah, that only works when I do it.

Brian: Oh, my God. Fred Savage is the greatest actor in the world!
Savage: That's all I ever wanted to be known for.
Lois: Is it okay if we run this story instead?
Savage: Sure thing!
Daniel Stern: [as the voice-over from "The Wonder Years"] It was just then that I knew that things were finally going my...
Savage: [angrily] I DON'T NEED YOU ANYMORE!!!

Brian: Lauren just finished a fascinating doctoral thesis on sub-orbital propulsion mechanisms that NASA is using for the next generation of space shuttles.
Chris and Meg: Oooohhhhhh... Aaaaahhhh!
Peter: So, Lauren, um, whenever I'm watchin' your show... you give me wood. Where do we go from here?

Stewie: Brian, why does the North Pole have black teenagers?
Brian: Um, uh, from Katrina?

Brian: Ah, it's a period joke!
Peter: Ah, it's a period period joke!

Meg, you're so beautiful on the inside... but it's important that you know your limitations.

Lois, I only ask this because of the dire situation I'm in. But can I hump your legs for 15 uninterrupted seconds?

Brian: Uh no... uh I'm going to meet Jenny's cats.
Peter: What are you talking about? You hate cats.
Brian (gritting his teeth): I'm... going... to... meet... her cats...

Family Guy Quotes

Aunt Margarite [on her video will]: Lois, you were always my favorite niece; I just knew you would find a wonderful man who would make all your dreams come true. But I was wrong.
Peter: And now you're dead. Score one for Peter

But now that you mention it, your face looks like a used condom.

Quagmire