Leela: Fry, we have a crate to deliver.
Fry: Well, let's just dump it in the sewer and say we delivered it.
Bender: Too much work. Let's burn it and say we dumped it in the sewer.
Leela: OK, if everyone's finished being stupid?
Fry: I had more, but you go ahead.
or
Fry: It's just like the story of the grasshopper and the octopus. All year long, the grasshopper kept burying acorns for winter, while the octopus mooched off his girlfriend and watched TV. But then the winter came, and the grasshopper died, and the octopus ate all his acorns. Also he got a race car. Is any of this getting through to you?
and my favorite
Fry: Hey, wait, I'm having one of those things... you know, a headache with pictures.
Leela: An idea?
Fry: Mmm! Mmm hmm!