Argubly the greatest dance routine ever too. Crazy thing about that song is "Triller" wasn't said until the song was almost over.
The original name for the track was "Starlight". Supposedly the late Mr. Jones is responsible for the change, thinking "Thriller" would make a better album title.
It's in the chorus throughout the song. Unless you really mean "triller", in which case, I'd have to consult with Bun B, or something.
Bun didn't hear the chorus until 10 minutes into the 14-minute video. Thriller was triller than most albums.