The Implant - S4-E19
Timmy: What are you doing?
George: What?
Timmy: Did...did you just double-dip that chip?
George: Excuse me?
Timmy: You double-dipped the chip.
George: Double-dipped? What are you talking about?
Timmy: You dipped the chip, you took a bite...and you dipped again.
George: So?
Timmy: That's like putting your whole mouth right in the dip! From now on, when you take a chip, just take one dip and end it.
Answer: The name is Delores. He shouts that name at the end of the episode. Then in a later episode, "The Foundation", he runs into her. And he repeatedly calls her Delores.