Menaced DENNIS or Wormy SHERMY is card 173a/173b from the fifth series.
Description[]
The card shows a boy with worms crawling in and out of him while he sleeps.
Parodies/Represents[]
The card makes fun of parasites and of childhood nightmares, and may be a reference to the playground chant "the worms crawl in, the worms crawl out," and the a name may be a joke on the character Dennis the Menace.