The Simpsons Season 5 Episode 1

(Homer, Apu and Skinner, with stubble on their faces, are in the recording studio)
Homer, Apu, Skinner: (singing off-key) For all the latest medical poop,
Call Surgeon General C. Everett Koop.
Poo poo pa-doop...
Apu: This is worse than your song about Mr. T.
Homer: I pity the fool who doesn't like... he. And where's Barney?
Skinner: Oh, he's with his new girlfriend, the Japanese conceptual artist.
(Barney and his girlfriend walk in, and Barney inserts a demo tape into a recorder)
Barney: Barbershop is in danger of growing stale! I'm taking it to strange new places!
(On the recorder)
Barney's Girlfriend: Number eight... (Barney belches) Number eight... (Barney belches) Number eight... (Barney belches)