A Sadie Hawkins dance is one where the women must ask the men in a reversal of traditional roles.
Buffy: You just went OJ
on your girlfriend.
In reference to the famed case where OJ Simpson
(allegedly) killed his ex-wife.
Snider: I'm no stranger to conspiracy. I saw
JFK.
The 1991 Oliver Stone movie
about the assassination of president John F Kennedy proports that there
was a complex conspiracy involved.
Xander: A little case of chalkboard Tourettes.
Tourettes Syndrome is a neurological
disorder that compels the sufferer to make sudden outburst of movement
or speech. The most sensationalized cases involve shouting obscene or otherwise
inappropriate words.
Buffy: Now we're Dr.
Laura for the deceased.
Dr. Laura is Laura
Schlessinger a widely know radio show host who offers advice to callers.
Willow: Exorcism.
Cordelia: Are you crazy. I saw that movie.
Even the priest died.
Cordy refers to the famous 1973 horror movie
the Exorcist.
Spike: All hat and no cattle.
This likely refers to those who wear cowboy hats but are not cowboys.