Vermicious Knids are a species of amorphous, shape-shifting monsters which invade the Space Hotel USA in Roald Dahl's Charlie and the Great Glass Elevator, the sequel to Charlie and the Chocolate Factory. In their natural form, they are huge, dark, egg-shaped beings that are quite at home in the vacuum of space. They attack space vessels by ramming them, pointy-end first.

Their one weak point is that they are show-offs, and cannot resist shaping themselves to spell the one word they know how to spell, before they attack.

That one word is "SCRAM"

Pronunciation of "knid" is said in the book to approximate adding a schwa between the k and nid, or in Dahl's words, "k'nid."