I’ve looked forever and always for this clip of Piper exclaiming “CHUPACABRA!” in one episode of Charmed. Now, with a quick YouTube search, I found the episode of season 4, Bite Me, where it was used [1].
But I’m snatching it before anyone dares take that down.
[audio:charmed-bite-me-chupacabra-piper.mp3]