Al Gore doll: "You are hearing me talk."
I didn't even know who Al Gore was at the time but that still cracked me up.
And, from "Bart Gets An Elephant":
Marge: Oh my, it looks like it could gore!
Homer: Heh heh, it DOES look like Al Gore...
: It's mindless now, clicking towards oblivion. ... How long, K-9?
: INSUFFICIENT DATA.
: Yeah, you never fucking know the answer when it's important.