Olivia: You are the weakest link, goodbye. (laughter)
Stewie: Ha ha ha! Oh gosh that's funny! That's really funny! Do you write your own material? Do you? Because that is so fresh. You are the weakest link goodbye. You know, I've, I've never heard anyone make that joke before. Hmm. You're the first. I've never heard anyone reference, reference that outside the program before. Because that's what she says on the show right? Isn't it? You are the weakest link goodbye. And, and yet you've taken that and used it out of context to insult me in this everyday situation. God what a clever, smart girl you must be, to come up with a joke like that all by yourself. That's so fresh too. Any, any Titanic jokes you want to throw at me too as long as we're hitting these phenomena at the height of their popularity. God you're so funny!

and some of this...

Lois: What kind of egotistical, selfish, moronic and idiotic person would get liposuction... Who? WHO?
(Peter walks in at half of his weight)
Stewie: Oh my God... It has finally happened, he has become so massive that he collapsed into himself like a neutron star.

Alright... I'm done copy and pasting. More quotes here.

*sigh* Conversations are too fast-paced nowadays, I feel. You just don't get the time anymore for a really nice, long, insulting rant without being interrupted.