"George's grandma has some pretty odd views. In fact, she's not a very nice person at all. She thinks caterpillars and slugs are delicious and likes to crunch on bettles best of all. George can do nothing right in Grandma's eyes, so when it's time for her medicine he decides to give her a dose of his special brew."

Part of a Roald Dahl boxset collection.

From Amazon.com:
In a typically wicked Dahl outing, a lad named George does away with his nasty grandmother by giving her a concoction that he brews from a mixture that includes shampoo, shaving cream and floor polish.