LUKE: Don’t you have anything better to do with your Saturdays?
KIRK: What can I say, I’m addicted to comedy. [to Rory and Christopher] Half an hour they been playing and it’s tied zero – zero. [louder] Hey, if you ever take this show on the road I got a name for you, Zero and Zero. Dean Zero and Luke Zero – get it?
Kirk seems to playing with the concept of double acts in comedy often being billed by their surnames, such as Abbot and Costello, or Laurel and Hardy [pictured]. Kirk is saying both Dean and Luke are a double act of “zeros”, and therefore a pair of losers.
The Annotated Gilmore Girls 