Faster Pussycat! Kill! Kill! BtVS Intertext/Allusion.
After Angelus has killed Jenny Calendar (leaving her dead body in Giles' bed), the Scoobies discover that Giles may be seeking revenge.
WILLOW: Look, all his weapons are gone.
CORDELIA: But I thought he kept his weapons at the library.
XANDER: No, those are his, uh, everyday weapons. These were his good weapons. The ones he, uh, breaks out when company comes to visit.
WILLOW: So he's not here.
CORDELIA: Well, then where is he?
BUFFY: He'll go to wherever Angel is.
WILLOW: That means the factory, right?
CORDELIA: So Giles is gonna try to kill Angel then?
XANDER: Well, it's about time somebody did.
WILLOW: Xander!
XANDER: I'm sorry, but let's not forget that I hated Angel long before you guys jumped on the bandwagon. So I think I deserve a little something for not saying "I told you so" long before now. And if Giles wants to go after the, uh, fiend that murdered his girlfriend, I say, "Faster, Pussycat! Kill! Kill!"
Xander has evidently been watching the films of 1960s and 70s schlockmeister Russ Meyer (1922- ). The IMDB offers a plot summary of Pussycat:
Three wild women in three fast cars take time off from stripping in clubs to go on a murder rampage. They kidnap and drug the girlfriend of one of their victims and hole up at a secluded ranch owned by a wheelchair-bound man and his two sons.