From "The Cosby Show: Halloween (#2.6)"
[getting the kids ready for Trick-or-treating
] And do you have a song while go out there?
Rudy Huxtable, Katie, Peter Chiara
[singing in unison; as the sitcom audience laughs
] Trick or treat, smell my feet/ Give me something good to eat!/ If you don't, I don't care/ I'll pull down your underwear!
[a short pause
] I don't think that's an appropriate song.