C/A spice: Mild
This is the first episode in season two of BtVS.
After Buffy's bump and grind with Xander that manages to make both Angel and Willow jealous, Cordy (of all people) tries to talk some sense into Buffy. This is her infamous scene.
Cordelia: Whatever is causing the Joan Collins 'tude, deal with it.
Embrace the pain, spank your inner moppet, whatever, but get over it.
'Cause pretty soon you're not even gonna have the loser friends you've
Buffy: I think it's about time you start minding your own business.
Cordelia: It's long past.
Buffy: (turns and goes) Nighty-night. (flips up her hood)
Cordelia: I'll just see if Angel feels like dancing.