Nightmare Before Christmas, The Easter Egg - Tender Lumplings

In the song "This is Halloween," the lyrics include this verse:

Tender lumplings everywhere
Life's no fun without a good scare

Tender lumplings refers back to Oingo Boingo, the band of the composer and singing voice of Jack, Danny Elfman. The Oingo Boingo Song is found on the CD "Boingo," and is also a relic from the days of the Mystic Knights of the Oingo Boingo.