Leela: Last night was a mistake.
Zapp: A sexy mistake.
Leela: No, just a regular mistake.

Episode 1.4 - Love’s Labours Lost in Space

Planet Express Ship: Let us become one!
Bender: I prefer two. That way we can still be a horse for Halloween.

Episode 4.3 - Love and Rocket

Robot Stack: We’re putting you in the Witness Relocation Program.
Bender: I gotta hide forever?
Robot Stack: No, until the Robot Mafia finds and kills you. They’re very good with that.

Episode 6.14 - The Silence of the Clamps

Fry: Start with a compliment. Tell her she looks thin.
Zoidberg: You seem malnourished. Are you suffering from internal parasites?
Edna: Why, yes. Thanks for noticing.

Episode 2.5 - Why Must I Be a Crustacean in Love?

A variation of this

Fry: So I really am important? How I feel when I’m drunk is correct?
Ken: Yes. Except the Dave Matthews Band doesn’t rock.

Episode 4.10 - The Why of Fry

Farnsworth: I’m ready to seduce. I’m wearing my kissing dentures and my evening truss.
Larry: Here. Give her these.
[He hands him some flowers.]
Fry: And if that doesn’t work, I got you a six-pack of champagne and a funnel.

Episode 2.14 - Mother’s Day

Fry: I must be a robot. Why else would human women refuse to date me?
Leela: Oh, lots of reasons.

Episode 3.11 - Insane in the Mainframe

(A wild snake appears)
Amy: Ahh! He’s gonna eat us!
Farnsworth: Don’t be such a finch! We Galapagos Tortoises have no natural predators.
Amy: (As the snake swallows her) That’s so fascinating!

Episode 7.13 - Naturama

Bender: Just get 5 grand an bail me out.
Amy: I don’t have that kind of money laying around.
Bender: Yeah, you do. You know that floor safe where you keep 10 grand? There’s 5 grand in there.

Episode 6.4 - Proposition Infinity.

Ndnd: I demand the ancient ritual of Rrrmrrrmrrrfrrrmrrr or Consequences!
Fry: Rrrmrrrmrrrfrrrmrrr or what?

Episode 6.11 - Lrrreconcilable Ndndifferences